Steyr's late-Gothic parish church was begun in 1443 by the architects of the Vienna Stephansdom. The high choir, ribbed vaults, and tall stained-glass windows are characteristic of the Donau school. The interior preserves much of its original layout despite Baroque alterations.
The church is an active parish and free to enter; Sunday concerts are common. The neighbouring parish house, the Mesnerhaus, is where Schubert lodged. Together they make this corner of the upper town a small musical pilgrimage.