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.References:
Spišskà Kapitula, a unique fortified ecclesiastical ensemble, began as a small fortified settlement overlooking Spišské Podhradie in the 12th century. It was the site of the residence of the Provost of the castle, in the no longer extant St Martin"s monastery, and later became a capitulary. This was destroyed in by Tatars in 1241-1243, but the pilgrim"s chapel, in rotunda form and dedicated to the Virgin, survived until the 18th century and the monastery until the 15th century.
The complex of buildings there is based on the Cathedral of St Martin, where building began in 1285 as a three-aisled Romanesque basilica with a chancel at the west end and a double spire. It owes its present form to successive remodellings and additions in the Gothic, Renaissance and Baroque styles.
The Provost's residence was completed in 1281 and further religious buildings were added. Frequent raids by marauding Bulgars and others led to its being fortified in the 14th century. The cathedral was rebuilt in the later 14th century. In 1776 it became the residence of the Bishop and four years later a seminary was established. In 1819 the first teacher training centre in Hungary was founded there.
The Bishop's Palace is largely Baroque, with some excellent interior decorations, like many of the religious buildings in the group. The oval ground plan of the centre of the town is due to its having been fortified in the 14th century. The various religious buildings had defensive functions in this early period. New monastery buildings were erected when the provost"s residence was rebuilt and the whole area fortified. The earlier central fortifications were removed in the 18th century.
Spišské Kapitula is part of the UNESCO World Heritage site Levoča, Spiš Castle and the associated cultural monuments.