Fort im Park von Sanssouci, Military model fortress in Park Sanssouci, Germany

Fort in Park Sanssouci is a triangular model fortress built at 1:10 scale showing detailed artillery positions and defensive layouts. The structure includes carefully designed functional areas arranged to demonstrate military principles.

Krupp company built this model in 1893 to show Kaiser Wilhelm II new fortification technologies. The structure represented advanced military thinking of the late 1800s.

Locals long called the earthwork the "Prinzenspielplatz" (princes' playground), as the princes' real playground stood near the Neues Palais. It is likely the princes used the model for military instruction. The nickname stuck even though Krupp built the fort as a weapons demonstration for Wilhelm II.

The fortress has been closed to visitors since 2004 as the Prussian Palaces and Gardens Foundation covered the ruins for protection. You can see the structure from the park paths and surrounding areas from the outside.

Belgian engineer Henri Alexis Brialmont designed specific elements for this fortress. His innovative approach to coordinating infantry and artillery made the project a practical demonstration of his engineering theories.