Altes Boyneburger Schloss, Medieval château in Wichmannshausen district, Sontra, Germany.

The Altes Boyneburger Schloss is a three-story sandstone building standing at the northeastern edge of the historic village center in Sontra, next to the village church of Wichmannshausen. The interior spaces spread across three floors and now house a museum with exhibition areas.

In the second half of the 15th century, the Wichmannshausen branch of the von Boyneburg family left its castle seat on the nearby Boyneburg and moved into a three-story building of red sandstone directly east of the village church. After a new manor house was built on the estate in 1757, the older residence became known as the Altes Schloss. In 1977 the building was made available to a museum association, and after renovation from 1979 to 1985 it opened as a museum in 1986.

The museum displays objects from daily life in the region and tells stories of crafts, celebrations, and traditions that shaped life here. Visitors get a sense of how people in this area once worked and lived together.

The building is open to visitors from May to September and allows access to exhibition rooms on all three floors. Entry is straightforward and the rooms are easy to walk through, as the old house is a manageable size.

The Wärterhaus opposite the courtyard entrance stands on a massive base; it was not restored in 2017. That year the castle courtyard itself was redesigned and renovated with help from BBO Eschwege.