The Kirche am Steinhof (also called the Church of St. Leopold) in Vienna is one of the most famous Art Nouveau churches in the world.
It is the flashy centre of the Steinhof sanatorium, located on a hillside in the district of Penzing. It was built in 1903-1907 by Otto Wagner, with mosaics and stained glass by Koloman Moser.

As of 2005, it was renovated.