The site of the current Electoral Palace was already part of the Ancient Roman Imperial Palace that was used by Constantine the Great in the early 4th century. The used as the Elector's throne room, is Roman. Some Roman mosaics also survive. From the 11th century onward the archbishops of Trier used the Basilica, of which only the outer walls were standing, as a stronghold. The apse was fortified to serve as a bergfried and merlons were added to the other walls. In the late 16th century, archbishop Johann von Schönenberg planned building a residence in the style of the German Renaissance for which parts of the Medieval fortress, as well as many houses, were demolished. It was only because the Roman walls proved to be resistant that some of them were incorporated in the new structure. Von Schönenberg's successors, Lothar von Metternich and Philipp Christoph von Sötern, completed the lower palace around 1650. The new residence was known as Saint Peter's Castle, after the town's patron saint. A chapel dedicated to Saint Lawrence stood on the south-west corner. In the same period work had started on the upper palace wings but this project was halted as a result of the Thirty Years' War. At this time, the bishops preferred their Koblenz residence at Ehrenbreitstein, which was considered safer. From 1756 onwards, archbishop-elector Johann IX Philipp von Walderdorff had the south wing of the Trier Palace rebuilt in Rococo style by Johannes Seiz. Around the same time the Baroque gardens were fitted out with garden statues by Ferdinand Tietz. In 1794 the French revolutionary armies conquered half of the Rhineland, including Trier. The Electoral Palace was confiscated and used as barracks. This continued after the Prussians took over in 1814. Around 1850 it was decided that the Basilica of Constantine was going to be rebuilt as it had appeared in the fourth century. For that reason the west wing of the Electoral Palace were to be demolished. In the original plans, the south wing would be demolished too but this was prevented as the Rococo staircase in the interior was considered monumental even then. During the Second World War the palace was severely damaged. After the war only the Hochschloss was restored. The Niederschloss was demolished except for the Red Tower and the Petersburg Gate. Today most of the palace is in use as governmental offices. Classical music concerts are performed in the Grand Chamber of the rococo south wing and the courtyard. Part of the north wing is used by the Evangelical-Lutheran congregation of Trier which holds its services in the adjacent Basilica.
Architecture
Exterior Niederschloss
Of the Niederschloss only the Red Tower and the Petersburg Portal remain. It was not until 1968 that the Red Tower got its roof back. It was then used as a bell tower for the Basilica. The site of the demolished wings is now called Willy-Brandt-Platz. It features a "water dial fountain".
Exterior Hochschloss
The Hochschloss consists of three wings built in a mix of architectural styles: Renaissance, Baroque and Rococo. In the 19th century the westernmost bays of the south wing were demolished in order to reveal the south façade of the Basilica. As a result the south wing of the palace is no longer symmetrical. Only the central part is in Rococo style. Somewhat odd is the overlap between the severe brick architecture of the Late Roman Basilica and the decorative Baroque and Rococo architecture of the adjacent building.
Interior south wing
The famous Rococo staircase is the main reason why the south wing was not demolished in its entirety. Despite severe war damage, some of the Rococo sculptures, stuccos and paintings are still in situ.
Palace garden
Since the early 20th century the former palace gardens have been open to the public. A notable feature are the garden statues by Ferdinand Tietz. Some of the more frivolous ones seem at odds with the former ecclesiastic purpose of the palace.
