The Musée Picasso, formerly the Château Grimaldi at Antibes, is built upon the foundations of the ancient Greek town of Antipolis. The castle was a residence of the bishops in the Middle Ages (from 442 to 1385). The castle was moved in 1385 to the Monegasque family. In 1608 it became a stronghold of the Grimaldi family and has borne their name ever since. In 1702 it became the town hall of Antibes.
From 1925 the chateau was known as the Grimaldi Museum. In 1946 it was the home for six months of the artist Pablo Picasso. Today the museum is known as the Picasso Museum, the first museum in the world to be dedicated to the artist.
Picasso himself donated works to the museum, most notably his paintings 'The Goat' and 'La Joie de Vivre'. In 1990 Jacqueline Picasso bequested many works by Picasso to the museum. These included 4 paintings, 10 drawings, 2 ceramics and 6 etchings. These are displayed at the Château in addition to the 3 works on paper, 60 etchings and 6 carpets by Pablo Picasso which the museum collected between 1952 and 2001. Today the collection totals 245 works by Picasso.
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.