diff --git a/src/ifcopenshell-python/ifcopenshell/api/boundary/remove_boundary.py b/src/ifcopenshell-python/ifcopenshell/api/boundary/remove_boundary.py
index dc82c5ea84..2d77f74f06 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/boundary/remove_boundary.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/boundary/remove_boundary.py
@@ -16,6 +16,7 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
+import ifcopenshell
 import ifcopenshell.util.element
 
 
@@ -48,4 +49,7 @@ class Usecase:
         if geometry:
             self.settings["boundary"].ConnectionGeometry = None
             ifcopenshell.util.element.remove_deep2(self.file, geometry)
+        history = self.settings["boundary"].OwnerHistory
         self.file.remove(self.settings["boundary"])
+        if history:
+            ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/document/remove_information.py b/src/ifcopenshell-python/ifcopenshell/api/document/remove_information.py
index 7869a1c317..a1dd69b51c 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/document/remove_information.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/document/remove_information.py
@@ -17,7 +17,9 @@
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
 
+import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -56,5 +58,8 @@ class Usecase:
                 self.file.remove(rel)
 
         for rel in self.settings["information"].DocumentInfoForObjects or []:
+            history = rel.OwnerHistory
             self.file.remove(rel)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
         self.file.remove(self.settings["information"])
diff --git a/src/ifcopenshell-python/ifcopenshell/api/drawing/unassign_product.py b/src/ifcopenshell-python/ifcopenshell/api/drawing/unassign_product.py
index 7c86af8463..8b0e514935 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/drawing/unassign_product.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/drawing/unassign_product.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -61,7 +62,11 @@ class Usecase:
             if not rel.is_a("IfcRelAssignsToProduct") or rel.RelatingProduct != self.settings["relating_product"]:
                 continue
             if len(rel.RelatedObjects) == 1:
-                return self.file.remove(rel)
+                history = rel.OwnerHistory
+                self.file.remove(rel)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
+                return
             related_objects = list(rel.RelatedObjects)
             related_objects.remove(self.settings["related_object"])
             rel.RelatedObjects = related_objects
diff --git a/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py b/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py
index b7c7dfb38f..0ade115de1 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/group/remove_group.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -57,7 +58,16 @@ class Usecase:
                 )
             elif inverse.is_a("IfcRelAssignsToGroup"):
                 if inverse.RelatingGroup == self.settings["group"]:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
                 elif len(inverse.RelatedObjects) == 1:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
+        history = self.settings["group"].OwnerHistory
         self.file.remove(self.settings["group"])
+        if history:
+            ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/material/assign_profile.py b/src/ifcopenshell-python/ifcopenshell/api/material/assign_profile.py
index ac5984b88b..c994f41f53 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/material/assign_profile.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/material/assign_profile.py
@@ -111,6 +111,7 @@ class Usecase:
                             self.change_profile(element)
 
         if old_profile and len(self.file.get_inverse(old_profile)) == 0:
+            # TODO: check remove deep
             self.file.remove(old_profile)
 
     def change_profile(self, element):
diff --git a/src/ifcopenshell-python/ifcopenshell/api/material/remove_material.py b/src/ifcopenshell-python/ifcopenshell/api/material/remove_material.py
index 6d8b4bb6fe..5c048734c7 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/material/remove_material.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/material/remove_material.py
@@ -17,6 +17,7 @@
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
 import ifcopenshell
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -59,7 +60,10 @@ class Usecase:
             elif inverse.is_a("IfcMaterialProfile"):
                 self.file.remove(inverse)
             elif inverse.is_a("IfcRelAssociatesMaterial"):
+                history = inverse.OwnerHistory
                 self.file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcMaterialProperties"):
                 for prop in inverse.Properties or []:
                     self.file.remove(prop)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/material/remove_material_set.py b/src/ifcopenshell-python/ifcopenshell/api/material/remove_material_set.py
index b9cb577a89..9eb7bcab62 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/material/remove_material_set.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/material/remove_material_set.py
@@ -17,6 +17,7 @@
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
 import ifcopenshell
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -73,7 +74,10 @@ class Usecase:
         self.file.remove(self.settings["material"])
         for inverse in inverse_elements:
             if inverse.is_a("IfcRelAssociatesMaterial"):
+                history = inverse.OwnerHistory
                 self.file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcMaterialProperties"):
                 for prop in inverse.Properties or []:
                     self.file.remove(prop)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/material/remove_profile.py b/src/ifcopenshell-python/ifcopenshell/api/material/remove_profile.py
index d7c0ec35fb..4174d067cb 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/material/remove_profile.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/material/remove_profile.py
@@ -17,6 +17,10 @@
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
 
+import ifcopenshell
+import ifcopenshell.util.element
+
+
 class Usecase:
     def __init__(self, file, profile=None):
         """Removes a profile item from a profile set
@@ -65,5 +69,10 @@ class Usecase:
         self.settings = {"profile": profile}
 
     def execute(self):
+        subelements = set()
+        for attribute in self.settings["profile"]:
+            if isinstance(attribute, ifcopenshell.entity_instance):
+                subelements.add(attribute)
         self.file.remove(self.settings["profile"])
-        # TODO: deep purge
+        for subelement in subelements:
+            ifcopenshell.util.element.remove_deep2(self.file, subelement)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/material/unassign_material.py b/src/ifcopenshell-python/ifcopenshell/api/material/unassign_material.py
index 93361eef66..e59e510c40 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/material/unassign_material.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/material/unassign_material.py
@@ -65,7 +65,10 @@ class Usecase:
                             continue
                         for inverse2 in self.file.get_inverse(inverse):
                             if inverse2.is_a("IfcRelAssociatesMaterial"):
+                                history = inverse2.OwnerHistory
                                 self.file.remove(inverse2)
+                                if history:
+                                    ifcopenshell.util.element.remove_deep2(self.file, history)
                     else:
                         if not inverse.is_a("IfcMaterialUsageDefinition"):
                             continue
@@ -80,7 +83,10 @@ class Usecase:
                     if self.file.get_total_inverses(rel.RelatingMaterial) == 1 and len(rel.RelatedObjects) == 1:
                         self.file.remove(rel.RelatingMaterial)
                 if len(rel.RelatedObjects) == 1:
+                    history = rel.OwnerHistory
                     self.file.remove(rel)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
                     continue
                 related_objects = set(rel.RelatedObjects)
                 related_objects.remove(self.settings["product"])
diff --git a/src/ifcopenshell-python/ifcopenshell/api/owner/remove_actor.py b/src/ifcopenshell-python/ifcopenshell/api/owner/remove_actor.py
index 99aa5fe33d..2f48ded614 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/owner/remove_actor.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/owner/remove_actor.py
@@ -16,7 +16,8 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
-import ifcopenshell.api
+import ifcopenshell
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -48,4 +49,7 @@ class Usecase:
         self.settings = {"actor": actor}
 
     def execute(self):
+        history = self.settings["actor"].OwnerHistory
         self.file.remove(self.settings["actor"])
+        if history:
+            ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/profile/remove_profile.py b/src/ifcopenshell-python/ifcopenshell/api/profile/remove_profile.py
index 5b78f67c9a..ce037686e1 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/profile/remove_profile.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/profile/remove_profile.py
@@ -16,6 +16,9 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
+import ifcopenshell
+import ifcopenshell.util.element
+
 
 class Usecase:
     def __init__(self, file, profile=None):
@@ -39,5 +42,10 @@ class Usecase:
         self.settings = {"profile": profile}
 
     def execute(self):
+        subelements = set()
+        for attribute in self.settings["profile"]:
+            if isinstance(attribute, ifcopenshell.entity_instance):
+                subelements.add(attribute)
         self.file.remove(self.settings["profile"])
-        # TODO: deep purge
+        for subelement in subelements:
+            ifcopenshell.util.element.remove_deep2(self.file, subelement)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/project/unassign_declaration.py b/src/ifcopenshell-python/ifcopenshell/api/project/unassign_declaration.py
index 1bf9541e30..25f3bdf64c 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/project/unassign_declaration.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/project/unassign_declaration.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -66,4 +67,7 @@ class Usecase:
             rel.RelatedDefinitions = list(related_definitions)
             ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": rel})
         else:
+            history = rel.OwnerHistory
             self.file.remove(rel)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py b/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
index c17079dffc..0857c4387e 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/pset/remove_pset.py
@@ -16,6 +16,9 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
 
+import ifcopenshell
+import ifcopenshell.util.element
+
 
 class Usecase:
     def __init__(self, file, product=None, pset=None):
@@ -72,6 +75,12 @@ class Usecase:
                     if enumeration and self.file.get_total_inverses(enumeration) == 1:
                         self.file.remove(enumeration)
                 self.file.remove(prop)
+            history = self.settings["pset"].OwnerHistory
             self.file.remove(self.settings["pset"])
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
         for element in to_purge:
+            history = getattr(element, "OwnerHistory", None)
             self.file.remove(element)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/root/remove_product.py b/src/ifcopenshell-python/ifcopenshell/api/root/remove_product.py
index 257dc1aba3..4d0ee047be 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/root/remove_product.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/root/remove_product.py
@@ -128,48 +128,90 @@ class Usecase:
             elif inverse.is_a("IfcRelSpaceBoundary"):
                 ifcopenshell.api.run("boundary.remove_boundary", self.file, boundary=inverse)
             elif inverse.is_a("IfcRelFillsElement"):
+                history = inverse.OwnerHistory
                 self.file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelVoidsElement"):
+                history = inverse.OwnerHistory
                 self.file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelServicesBuildings"):
+                history = inverse.OwnerHistory
                 self.file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelNests"):
                 if inverse.RelatingObject == self.settings["product"]:
                     for subelement in inverse.RelatedObjects:
                         if subelement.is_a("IfcDistributionPort"):
                             ifcopenshell.api.run("root.remove_product", self.file, product=subelement)
                     if not inverse.RelatedObjects:
+                        history = inverse.OwnerHistory
                         self.file.remove(inverse)
+                        if history:
+                            ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelAggregates"):
                 if inverse.RelatingObject == self.settings["product"] or len(inverse.RelatedObjects) == 1:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelContainedInSpatialStructure"):
                 if inverse.RelatingStructure == self.settings["product"] or len(inverse.RelatedElements) == 1:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelConnectsElements"):
                 if inverse.is_a("IfcRelConnectsWithRealizingElements"):
                     if self.settings["product"] not in (inverse.RelatingElement, inverse.RelatedElement) and any(
                         el for el in inverse.RealizingElements if el != self.settings["product"]
                     ):
                         continue
+                history = inverse.OwnerHistory
                 self.file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelConnectsPorts"):
                 if self.settings["product"] not in (inverse.RelatingPort, inverse.RelatedPort):
                     # if it's not RelatingPort/RelatedPort then it's optional RealizingElement
                     # so we keep the relationship
                     continue
+                history = inverse.OwnerHistory
                 self.file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelAssignsToGroup"):
                 if len(inverse.RelatedObjects) == 1:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelAssignsToProduct"):
                 if inverse.RelatingProduct == self.settings["product"]:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
                 elif len(inverse.RelatedObjects) == 1:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
             elif inverse.is_a("IfcRelFlowControlElements"):
                 if inverse.RelatingFlowElement == self.settings["product"]:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
                 elif inverse.RelatedControlElements == (self.settings["product"],):
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
+        history = self.settings["product"].OwnerHistory
         self.file.remove(self.settings["product"])
+        if history:
+            ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/system/connect_port.py b/src/ifcopenshell-python/ifcopenshell/api/system/connect_port.py
index a39794a5d7..c919a153d0 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/system/connect_port.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/system/connect_port.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -138,16 +139,28 @@ class Usecase:
     def purge_existing_connections_to_other_ports(self):
         for rel in self.settings["port1"].ConnectedTo or []:
             if rel.RelatedPort != self.settings["port2"]:
+                history = rel.OwnerHistory
                 self.file.remove(rel)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
         for rel in self.settings["port1"].ConnectedFrom or []:
             if rel.RelatingPort != self.settings["port2"]:
+                history = rel.OwnerHistory
                 self.file.remove(rel)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
         for rel in self.settings["port2"].ConnectedTo or []:
             if rel.RelatedPort != self.settings["port1"]:
+                history = rel.OwnerHistory
                 self.file.remove(rel)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
         for rel in self.settings["port2"].ConnectedFrom or []:
             if rel.RelatingPort != self.settings["port1"]:
+                history = rel.OwnerHistory
                 self.file.remove(rel)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
 
     def set_connected_to(self):
         if self.settings["port1"].ConnectedTo:
@@ -175,11 +188,17 @@ class Usecase:
 
     def purge_connected_to(self):
         for rel in self.settings["port1"].ConnectedTo or []:
+            history = rel.OwnerHistory
             self.file.remove(rel)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
 
     def purge_connected_from(self):
         for rel in self.settings["port1"].ConnectedFrom or []:
+            history = rel.OwnerHistory
             self.file.remove(rel)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
 
     def set_realising_element(self):
         for rel in self.settings["port1"].ConnectedTo or []:
diff --git a/src/ifcopenshell-python/ifcopenshell/api/system/disconnect_port.py b/src/ifcopenshell-python/ifcopenshell/api/system/disconnect_port.py
index 3782e8e27b..dd17078964 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/system/disconnect_port.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/system/disconnect_port.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -76,4 +77,7 @@ class Usecase:
         for rel in rels:
             rel.RelatingPort.FlowDirection = None
             rel.RelatedPort.FlowDirection = None
+            history = rel.OwnerHistory
             self.file.remove(rel)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/system/remove_system.py b/src/ifcopenshell-python/ifcopenshell/api/system/remove_system.py
index d135e9f0ad..f4cfe0e2d3 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/system/remove_system.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/system/remove_system.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -59,7 +60,16 @@ class Usecase:
                 )
             elif inverse.is_a("IfcRelAssignsToGroup"):
                 if inverse.RelatingGroup == self.settings["system"]:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
                 elif len(inverse.RelatedObjects) == 1:
+                    history = inverse.OwnerHistory
                     self.file.remove(inverse)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
+        history = self.settings["system"].OwnerHistory
         self.file.remove(self.settings["system"])
+        if history:
+            ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/system/unassign_flow_control.py b/src/ifcopenshell-python/ifcopenshell/api/system/unassign_flow_control.py
index 63e3c58c6a..3ed1fe4cd5 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/system/unassign_flow_control.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/system/unassign_flow_control.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -64,7 +65,11 @@ class Usecase:
         if assignment.RelatingFlowElement != self.settings["relating_flow_element"]:
             return
         if len(assignment.RelatedControlElements) == 1:
-            return self.file.remove(assignment)
+            history = assignment.OwnerHistory
+            self.file.remove(assignment)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
+            return
         related_flow_controls = list(assignment.RelatedControlElements)
         related_flow_controls.remove(self.settings["related_flow_control"])
         assignment.RelatedControlElements = related_flow_controls
diff --git a/src/ifcopenshell-python/ifcopenshell/api/system/unassign_port.py b/src/ifcopenshell-python/ifcopenshell/api/system/unassign_port.py
index f9c151c348..81c8751945 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/system/unassign_port.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/system/unassign_port.py
@@ -63,7 +63,10 @@ class Usecase:
         for rel in self.settings["element"].IsNestedBy or []:
             if self.settings["port"] in rel.RelatedObjects:
                 if len(rel.RelatedObjects) == 1:
+                    history = rel.OwnerHistory
                     self.file.remove(rel)
+                    if history:
+                        ifcopenshell.util.element.remove_deep2(self.file, history)
                     return
                 related_objects = set(rel.RelatedObjects) or set()
                 related_objects.remove(self.settings["port"])
@@ -73,5 +76,8 @@ class Usecase:
     def execute_ifc2x3(self):
         for rel in self.settings["element"].HasPorts or []:
             if rel.RelatingPort == self.settings["port"]:
+                history = rel.OwnerHistory
                 self.file.remove(rel)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
                 return
diff --git a/src/ifcopenshell-python/ifcopenshell/api/system/unassign_system.py b/src/ifcopenshell-python/ifcopenshell/api/system/unassign_system.py
index 5ead349991..c96ffa02a1 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/system/unassign_system.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/system/unassign_system.py
@@ -18,6 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api
+import ifcopenshell.util.element
 
 
 class Usecase:
@@ -64,4 +65,7 @@ class Usecase:
             rel.RelatedObjects = list(related_objects)
             ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": rel})
         else:
+            history = rel.OwnerHistory
             self.file.remove(rel)
+            if history:
+                ifcopenshell.util.element.remove_deep2(self.file, history)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/type/assign_type.py b/src/ifcopenshell-python/ifcopenshell/api/type/assign_type.py
index 4d0b615467..622f034b79 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/type/assign_type.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/type/assign_type.py
@@ -195,7 +195,10 @@ class Usecase:
                 is_typed_by[0].RelatedObjects = related_objects
                 ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": is_typed_by[0]})
             else:
+                history = is_typed_by[0].OwnerHistory
                 self.file.remove(is_typed_by[0])
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)
 
         if types:
             related_objects = list(types[0].RelatedObjects)
diff --git a/src/ifcopenshell-python/ifcopenshell/api/type/unassign_type.py b/src/ifcopenshell-python/ifcopenshell/api/type/unassign_type.py
index f302932c9c..843121f967 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/type/unassign_type.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/type/unassign_type.py
@@ -69,4 +69,7 @@ class Usecase:
                 is_typed_by.RelatedObjects = related_objects
                 ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": is_typed_by})
             else:
+                history = is_typed_by.OwnerHistory
                 self.file.remove(is_typed_by)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(self.file, history)