The church St. Peter und Paul in Weimar, also known as Herderkirche after Johann Gottfried Herder, is the most important church building of the town. The first church was built on the same location from 1245 to 1249, but destroyed by fire in 1299. Only the foundations remain. The second building was badly damaged in the 1424 town fire. The present building dates back to the a hall church in late Gothic style, built between 1498 and 1500. The choir served as the burial place of members of nobility of the House of Wettin in the Ernestine duchies. The church has been Lutheran since 1525, and Martin Luther gave sermons there.
Towards the end of the Second World War, the church was severely damaged by bombing on 9 February 1945. The pitched roof and the wooden vaults were largely destroyed, the remaining stone vaults in the eastern portions collapsed. The entire interior was badly affected. The church was opened again after reconstruction on 14 June 1953. The repair and restoration of the interior was performed until 1977. The church is part of the World Heritage Site Classical Weimar, together with eleven other sites.
Not much is left of the original Gothic interior, the baptismal font, the stairs to the pulpit and parts of a mural of St. Ursula. The remarkable triptych image of the city was begun by Lucas Cranach the Elder in 1552/53, shortly before his death, and completed in 1555 by his son Lucas Cranach the Younger. It is regarded as a major work of art of the 16th century in Saxony and Thuringia.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.