Mašťov Castle, Baroque château in Mašťov, Czech Republic.

Mašťov Castle is a baroque château in the Chomutov region of Czech Republic, distinguished by ornamental facades, turrets, and mansard roofs. Inside, the structure contains numerous rooms and halls where seventeenth-century design choices remain visible alongside later architectural additions.

Mašťov Castle was first mentioned in 1281, likely built by Břetislav and Purkart of Mašťov. In 1421 its garrison surrendered to the Second Crusade after artillery bombardment; 84 defenders were executed. Valdemar Hasištejnský of Lobkowicz had it rebuilt as a Renaissance chateau after 1555, and the Goltz family added Baroque modifications and a tower from 1662.

The name Mašťov comes from the village's founding family, the lords of Mašťov, first recorded in 1281. The castle chapel and the baroque tower clock mark the estate's role in parish life. A peasant revolt gathered several thousand farmers by the castle in 1682 before marching on Kadaň.

The château is owned by the Ústecký kraj and has served as a children's home since the 1950s, so the interiors are not open to the public. Visitors can view the exterior from the town square below: the four wings around a small courtyard, the prismatic tower with onion dome and clock, and the basin-shaped fountain before the entrance.

The five-sided plan of the château building may copy the perimeter of the original castle core, which was surrounded by a parkán. Two round artillery bastions survive on the western side; a town plan of 1727 records six in total.