The modern glass entrance behind the red sand-stone portal gives a free view of the projecting baroque adornments. St. Augustine's Church, which is located at the heart of the Old City, remained mostly unscathed during the Second World War and therefore offers an exceptional display of splendour in original condition. The mendicant order of Augustinian hermits had a monastery in the Augustinerstrasse from 1260 unti11803. Construction of the church was begun by the stonemason Johann Georg Schrantz in 1768. Today, the church of the diocesan seminary for Roman Catholic priests is located here. Its interior design is so rich because the patron generously encouraged the work of the Bavarian craftsmen specially hired for the task. The facade displays the vivid forms of the Main-Franconian and South German baraque.

The painter Johann Baptist Enderle, from Donauwoerth, glorified the life of St. Augustine in large ceiling paintings. Johann Heinrich Stumm built the divided organ in 1773. It is one of the last remaining instruments of this "organ-builder dynasty.”

A lime-wood sculpture of Mary with the Child Jesus (unusual in its brightness for a Gothic work of art, and categorised as "soft style"), smiles out of a niche between the south side altars. This highly acclaimed miraculous image was saved from the burning church of Our Lady in 1793.