St. Michael’s Church in Sagard is a single-nave, four-bay Romanesque church built in the early 13th century. Of the original late-Romanesque structure, the nave walls and the western part of the triumphal arch have survived to their full height. The structure of the Romanesque upper wall has been preserved almost completely inside and out. In about 1400 the choir was rebuilt in Gothic style (using demolition material from the Romanesque choir) and a sacristy was added.
Alterations to the nave by insertion of arcades in the north wall and the construction of a northern aisle and a southern chapel were made in the course of the 15th century. In the south wall of the Romanesque nave, Gothic windows were inserted. The west tower was built in about 1500. The choir has a flat board ceiling (the planned vault was never built). The nave was vaulted after completion of the west tower. In 1633 the polygonal spire was restored and the pavilion roof built. In 1786/87 the south chapel was extended by two rib-vaulted bays in Renaissance style. The two-storey sacristy was built in the 18th century using wall remnants from an older sacristy. The outer wall of the northern aisle was newly faced in 1917. The interior is whitewashed. Fittings are painted a uniform yellowish brown. The floor is paved with brick and clay tiling. The choir is raised by four steps. The rooftruss is medieval. Oldest furnishings and accessories are the corpus of a triumphal cross ensemble from the 15th century.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.