St. Peter's Cathedral is an interdenominational church in Bautzen. It is among the oldest and largest simultaneum churches in Germany. The first church was built around the 1000 AD. Near the beginning of the 13th century, a cathedral was built under the supervision of Bishop Bruno II.
Between 1456 and 1463, the cathedral that now stands was constructed and named after St. Peter. A fourth nave was added to the original structure. A fire decimated much of the city and church in 1634, and the church required a new vault and significant restoration work. The entire interior of the church, with the exception of the original Gothic-style which can still be seen today.
The church is a mixture of several different architectural styles, the most prominent being Gothic and Baroque. The early church was entirely a Gothic structure, but it has since been heavily modified. Today, only parts of the interior are Gothic in nature. The Baroque dome was added to the tower in 1664.
Today, Catholic and Lutheran altars are located on separate sides of the sanctuary. The Catholic high-altar was built in 1723. It was designed by a student of Balthasar Permoser, the same man that designed the Zwinger in Dresden. The altar murals were painted by the Venetian painter Pellegrini.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.