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:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.