Týnec nad Sázavou Castle, Medieval castle in Týnec nad Sázavou, Czech Republic.

Týnec nad Sázavou Castle stands on a hill above the left bank of the Sázava River. Its oldest surviving structure is the Romanesque rotunda of St. Wenceslas, which serves as the castle chapel. A prismatic tower, whose top floor is a viewing point, and the former palace building, now housing the town museum, also remain.

Archaeological finds from the late 1870s and early 1880s confirmed a castle existed here in the 11th century, first in wood and later in stone with the Romanesque rotunda. The first documented owner was Oldřich of Týnec in 1318, ancestor of the Medeks of Valdek, who held it until the 15th century. From the early 17th century it decayed, was repaired in the mid-18th century under Marie Anna O'Kelly, and later passed to the Czechoslovak Hussite Church.

The castle displays regional archaeological finds and traditional pottery from the area, showing how local craftspeople worked over many centuries.

The castle is best visited through guided tours that can be arranged by contacting the location directly. The town center location makes it convenient to reach and explore other nearby sights afterward.

The rotunda, the oldest surviving building in Týnec nad Sázavou, serves as a chapel for the Czechoslovak Hussite Church, while the town museum occupies the former palace. The castle grounds are also a protected natural monument because of a greater mouse-eared bat colony that summers in the tower.