One of the oldest Bavarian parish churches, St. Peter's Church was built on the site of the ancient Roman fortifications at the end of the XII century. Over the next five centuries, it was rebuilt from time to time, acquiring new stylistic features. Originally built in the Romanesque style, the church "acquired" Neo-Romanesque interior and baroque vaults.
St. Peter's Church keeps one of the city’s most valuable artworks - Romanesque crucifix above the altar dating to 1200. Pieta statues of 1400 and relief allegorical illustration of Good and Evil on the main portal are among other relics. The relief depicts a battle of a knight and dragon swallowing a man. The church complex includes three chapels: the Chapel of the Dead, the Chapel of Our Dear Lady and Agnes Bernauer Chapel, decorated with paintings and reliefs. The latter was built at the order of the Bavarian Duke Ernst I: in that way he expressed remorse over the killing (initiated by them) of Agnes Bernauer – the beloved of his son.