The Capel Bridge, commonly known as the Corridor Bridge, was built in the early 14th century as part of the city's defensive fortifications. In the 17th century, paintings were added under the eaves of the bridge to depict local historical events in Switzerland and Lucerne, including the biographies of Leodegar and Mauritius, the city's patron saints. There is an octagonal stone tower at the turning point of the bridge. The tower, more than 34 meters in height, was built around 1300 years ago. It was originally part of the city wall and used as an archive, treasury, prison and interrogation room.