The Karlskirche in Kassel (also Oberneustädter Kirche) is a Protestant church built by Paul du Ry in 1710 for the local Hugenot community.
The church was the location of a hundred-day sound installation by John Cage in 1987.
Coordinates: 51°18′42″N 9°29′41″E / 51.31167°N 9.49472°E