Fritz Schaller (born May 29, 1904 in Berlin - March 4, 2002 Cologne) was a German architect. His most famous buildings are the Kalkbergstadion in Bad Segeberg and the Domplatte. in addition he designed numerous Catholic churches.

Schaller studied at the Technical University of Karlsruhe and worked from 1929 in the Prussian Building Administration. He supported the Thingspiel movement, choral mass theater as a shared experience. Hundreds of theaters were planned in 1933/1934, but the Ministry of Propaganda stopped the movement in 1935 because the Thingspiel was originally founded in the Catholic Workers' Movement. Schaller joined the NSDAP in 1937.

Altogether he designed 64 sacral buildings and realized 30 of them, among them. He was curator of Europe-wide acclaimed church architecture exhibitions (Italy, France, Netherlands, Spain, Portugal), which contributed to the radiation of his concepts beyond the Cologne area. Among its most famous buildings is the eastern, northern and western part of the long-time architecturally controversial Domplatte around Cologne Cathedral. The eastern part of the former Wallraf Richartz Museum (now Museum Ludwig) 1980-1986 profoundly changed, the northern staircase to the main station by his son Christian Schaller 2005 transformed.