By Carl von Gontard, Georg Christian Unger, Neoclassical architecture.
The Potsdam Gate on the Luisenplatz in Potsdam, was built in 1770–71 by Carl von Gontard and Georg Christian Unger by order of Frederick II of Prussia, to celebrate his several victories in the Seven Years' War.
From Wikipedia, CC BY-SA 4.0.
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