The Stone Bridge, built 1135–1146, is a highlight of medieval bridge building. The knights of the 2nd and 3rd crusade used it to cross the Danube on their way to the Holy Land.

The Dom (Cathedral) is a very interesting example of pure German Gothic and counts as the main work of Gothic architecture in Bavaria. It was founded in 1275 and completed in 1634, with the exception of the towers, which were finished in 1869. The interior contains numerous interesting monuments, including one of Peter Vischer's masterpieces. Adjoining the cloisters are two chapels of earlier date than the cathedral itself, one of which, known as the old cathedral, goes back perhaps to the 8th century. The official choir for the liturgical music at St Peter's Cathedral are the famous Regensburger Domspatzen.