Mežotne Palace was built in Classicism style during 1798-1802 for a teacher and governess of the grandchildren of Russian Empress Catherine II, Charlotte von Lieven (1742–1828). Architects of the palace were famous Italian Giacomo Quarenghi and Johann Gottfried Adam Berlitz, architect of the Durbe Manor and the Kazdanga palace. Simultaneously with the palace there has also been developed an English style landscape park and complex of subsidiary buildings, creating one of the most impressive Classicism style ensembles in Latvia.
The palace suffered heavily in the First and later in the Second World War. The Lieven family owned the palace up to agrarian reform in 1920. Palace and park underwent reconstruction in 2001 and since then a hotel is located there.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.