Otto Wagner Church or Steinhof Church, (Kirche am Steinhof) - also called the Church of St. Leopold, was built between 1903 and 1907 by the 63-year-old architect Otto Wagner.
It is considered one of the most important Art Nouveau churches in the world.

The inside of the dome reflects a new age of controlled ornamentation.
The ceiling alludes to the sky above with its blue-glass panels representing the four apostles.