The Neues Schloss in Meersburg was the seat of the Prince-Bishop of Constance from its construction in 1750 until the bishopric was dissolved in 1803. Construction began in 1710 under Bishop Johann Franz II. von Stauffenberg, with Christoph Gessinger designing and supervising the work. It would be two years later in 1712 that the project was finished. The building was, however, a bit unfinished as a symbol of the power of the bishop. The upper story contained a number of apartments for visiting nobles and church leaders as the residence of a Prince-Bishop should, but it lacked a grand staircase and other trappings of wealth and power.
When Hugo Damian von Schönborn, who was already Bishop of Speyer and had already built Schloss Bruchsal there, took over the seat at Meersburg in 1740 he wanted to improve the Neues Schloss. He brought in the master builder Johann Georg Stahl from Bruchsal to turn the Schloss into a more impressive and elegant building. Following plans from Balthasar Neumann, Johann built an impressive staircase and decorated the castle.
From 1741 until 1743 the castle chapel was added, based on plans from Balthasar Neumann. The art and statues are the work of the fresco painter Gottfried Bernhard Göz from Augsburg (1708–1774) and the sculptor Joseph Anton Feuchtmayer (1696–1770).
By 1759 the Prince-Bishop Cardinal Franz Konrad von Rodt had the castle renovated under the direction of the master builder Franz Anton Bagnatos. The already dilapidated stairway had to be restored. The baroque facade of the castle was redone in the Rococo style, with enlarged windows, additional decoration around the windows and new gables.
The interior decoration is the work of the Mainz artist Giuseppe Appiani (c. 1705–1786) and the sculptor Carlo Luca Pozzi (1735–1803). Among the paintings by Appiani are two enormous paintings over the Grand Staircase from 1761 and over the ballroom from 1762.
During the 19th century and until 1955 the Schloss served as a school for girls, a local prison, a sailors' school, a secondary school and from 1865–1937 as the Baden Institution for Deaf-mutes, which moved to Gengenbach after 1937. Following World War II it was used as barracks for French troops.
Today the castle is home to several museums. In addition to the Town Gallery and the Dornier Museum, which take up the 2nd floor, the New Palace is also home to the Palace Museum of the Prince Bishops (Fürstbischöfliche Schlossmuseum) on the 3rd floor. It offers the opportunity to view the residential and representation rooms of the prince bishops refurnished with contemporary appointments from that age.References:
The Petersberg Citadel is one of the largest extant early-modern citadels in Europe and covers the whole north-western part of the Erfurt city centre. It was built after 1665 on Petersberg hill and was in military use until 1963. It dates from a time when Erfurt was ruled by the Electors of Mainz and is a unique example of the European style of fortress construction. Beneath the citadel is an underground maze of passageways that can be visited on guided tours organised by Erfurt Tourist Office.
The citadel was originally built on the site of a medieval Benedictine Monastery and the earliest parts of the complex date from the 12th century. Erfurt has also been ruled by Sweden, Prussia, Napoleon, the German Empire, the Nazis, and post-World War II Soviet occupying forces, and it was part of the German Democratic Republic (East Germany). All of these regimes used Petersberg Citadel and had an influence on its development. The baroque fortress was in military use until 1963. Since German reunification in 1990, the citadel has undergone significant restoration and it is now open to the public as a historic site.