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:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.