diff --git a/lib/dxf2lib.py b/lib/dxf2lib.py
index f72b2c5..61e06b6 100644
--- a/lib/dxf2lib.py
+++ b/lib/dxf2lib.py
@@ -17,14 +17,16 @@ def get_bbox(entities):
     max_x, max_y = float('-inf'), float('-inf')
     for e in entities:
         try:
-            # Für POLYLINE-Entities: Bounding Box manuell berechnen
             if e.dxftype() == "POLYLINE":
-                if hasattr(e, 'vertices') and len(e.vertices) > 0:
-                    for vertex in e.vertices:
-                        if hasattr(vertex, 'dxf') and hasattr(vertex.dxf, 'location'):
-                            x, y = vertex.dxf.location.x, vertex.dxf.location.y
-                            min_x, min_y = min(min_x, x), min(min_y, y)
-                            max_x, max_y = max(max_x, x), max(max_y, y)
+                for vertex in e.vertices:
+                    if hasattr(vertex.dxf, 'location'):
+                        x, y = vertex.dxf.location.x, vertex.dxf.location.y
+                        min_x, min_y = min(min_x, x), min(min_y, y)
+                        max_x, max_y = max(max_x, x), max(max_y, y)
+            elif e.dxftype() == "LWPOLYLINE":
+                for x, y, *_ in e.get_points("xy"):
+                    min_x, min_y = min(min_x, x), min(min_y, y)
+                    max_x, max_y = max(max_x, x), max(max_y, y)
             else:
                 # Für andere Entity-Typen: Standard bbox() verwenden
                 box = e.bbox()
@@ -35,8 +37,10 @@ def get_bbox(entities):
         except Exception as err:
             print(f"    BBox Fehler für {e.dxftype()}: {err}")
             continue
+
     if min_x == float('inf'):
         return None
+
     return Vec2((min_x + max_x) / 2, (min_y + max_y) / 2)
 
 if __name__ == "__main__":
@@ -101,11 +105,13 @@ if __name__ == "__main__":
         if name in doc.blocks:
             doc.blocks.delete_block(name)
 
-        blk = doc.blocks.new(name=name, base_point=center)
+        blk = doc.blocks.new(name=name, base_point=(0,0))
 
         for e in entities:
             try:
-                blk.add_entity(e.copy())
+                cp = e.copy()
+                cp.translate(-center.x, -center.y, 0)  # Geometrie verschieben!
+                blk.add_entity(cp)
             except Exception as err:
                 print(f"Fehler in {filename}: {err}")