Schloss Weimar was the residence of the dukes of Saxe-Weimar and Eisenach, and has also been called Residenzschloss. It is part of the UNESCO World Heritage Site 'Classical Weimar'.
In history, the palace was often destroyed by fire. The Baroque palace from the 17th century, with the church Schlosskirche where several works by Johann Sebastian Bach were premiered, was replaced by a Neoclassical structure after a fire in 1774. Four rooms were dedicated to the memory of poets who worked in Weimar, Johann Wolfgang von Goethe, Johann Gottfried Herder, Friedrich Schiller and Christoph Martin Wieland. From 1923, the building has housed the Schlossmuseum, a museum with a focus on paintings of the 15th and 16th centuries and works of art related to Weimar, a cultural centre.
The building has been developed over the past 500 years. The first building on the site was a medieval moated castle, which was first documented at the end of the 10th century. After a fire in 1424, and again from the mid-16th century, when Weimar became the permanent residence of the dukes, it was remodelled. After another fire in 1618, reconstruction began in 1619 planned by the Italian architect Giovanni Bonalino. The church was completed in 1630, where several works by Johann Sebastian Bach were premiered between 1708 and 1717. Johann Moritz Richter changed the design to a symmetrical Baroque structure with three wings, open to the south.
The building was destroyed by fire in 1774. Duke Carl August formed a commission for its reconstruction directed by Johann Wolfgang Goethe. Architects Johann August Arens, Nikolaus Friedrich Thouret and Heinrich Gentz kept the former walls of the east and north wings and created a 'classical' interior, especially the staircase and the banqueting hall. Decoration was supplied by sculptor Christian Friedrich Tieck. In 1816, Clemens Wenzeslaus Coudray began plans for the west wing, which was reopened in 1847 with a court chapel. The wing contained the so-called Dichterzimmer (poets' rooms), initiated by Duchess Maria Pavlovna. They commemorate Christoph Martin Wieland, Johann Gottfried Herder, Friedrich Schiller and Goethe. From 1912 to 1914 a south wing was added under Duke Wilhelm Ernst.
The Herder Room was restored in 2005, the restoration of the Goethe Room and the Wieland Room was completed in 2014.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.