Stefan Lüpges makes these unique handcrafted pieces in Germany. His website explains that the individual conical parts are cut out of a simple piece of wood. He also makes them out of a tree fungus or a root. Since the individual parts are cut in a cone shape, they clamp together when you pull them upwards creating a castle. When the turrets are pushed down, they reassemble into a piece of wood. The individual pieces can be removed downwards, creating a magical 3D puzzle. This example was purchased at the Nuremberg Christmas Market in 2023, but they are available from Zauber Bergen www.Zauberbergen.de.