Villa Carlshagen, Cultural heritage monument in Potsdam, Germany

Villa Carlshagen is a neoclassical villa at Olympischer Weg 1 in Potsdam, built in 1909–1910 by architect Friedrich Wilhelm Göhre for banker Carl Hagen. The thirteen-axis building has one and two storeys under a mansard hipped roof with dormers. A four-storey stair tower and a risalit with an entrance hall mark the west front; on the east garden side, a half-oval projection contains an oval dining room with three arched French doors facing the Templiner See.

Banker Carl Levy purchased the property in 1900 and commissioned architect Friedrich Wilhelm Göhre to transform it into a summer residence between 1909 and 1910. The building underwent comprehensive restoration after the Chamber of Commerce and Industry acquired it in 2012.

The name comes from banker Carl Hagen, born Carl Levy, who renamed himself in 1906 and used the villa as a summer residence. The oval dining room behind three arched garden doors looks over Templiner See, and the entrance hall and guest wing were added for receiving visitors. The brick boundary wall on Zeppelinstraße, with ceramic crown finials, dates from the first villa around 1870.

The villa stands at Olympischer Weg 1, surrounded by the Sportpark Luftschiffhafen; the lakeside section of the Reinhold-Mohr-Ufer foot and cycle path, part of the Europaradweg R1, was opened to the public in 2010. The building itself is not open for sightseeing, but the 130-metre path segment along the shore allows views of the exterior and the Templiner See.

The 130-metre stretch of the Reinhold-Mohr-Ufer foot and cycle path along the Templiner See shore was only opened to the public in 2010, after Pro Potsdam granted the public a limited personal easement over the waterfront. The path forms part of the Europaradweg R1.