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

The copper-covered dome is visible from quite a distance, as the church stands high on the crest of the hill (the Baumgartnerhöhe) below the Galitzinberg in the 14th Vienna district, Penzing.