Saint-Michel Basilica is a Baroque jewel with its incredible exterior, the bell-tower, the coloured cobbles of the parvis arranged to form the Grimaldi’s coat of arms and the “rampes Saint-Michel” (a series of flights of stairs).
The construction of the Basilica begun in 1640 under the reign of Honoré II, but took several centuries to be completed. The façade was then renovated in the 19th Century adding typical decor of the period such as smooth columns with ionic and corinthian capitals.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.