The Church of Our Lady of Remedy is perched on the slope of the St. John Mountain. It dates from 1518. The church can only be reached on foot: the rocks and the stairs that lead to the structures on the slope make this church a difficult and time-consuming place to reach. Nevertheless, many tourists and local citizens visit this church daily. It can be seen from a long distance.
The oldest known building in Montenegro, dating from the 6th century, based on archaeological evidence has been found under the Church of Our Lady of Remedy. An early Christian basilica, it is located close to the main city gate in the Old Town of Kotor.
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.