Basilica of the Assumption of the Blessed Virgin Mary in Krzeszów is a Roman Catholic church and abbey of the Order of Saint Benedict in Krzeszów, Lower Silesian Voivodeship. Built around 1728-1735, it is a notable baroque church in Silesia, with the art of Ferdinand Brokoff (sculptor) and Michael Willmann (painter). It is also one of the shrines to the Virgin Mary, with a 13th old painting. In one of the chapels there is a mausoleum to Silesian Piasts: Bolko I the Strict and Bolko II the Small.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.