Koldín Castle, Fortified house in Koldín, Czech Republic.

Koldín Castle is a fortified residence in the village of Koldín featuring solid stone walls and defensive construction elements characteristic of Czech noble dwellings. The building integrates living quarters with protective features such as reinforced walls and strategic layout, reflecting the practical needs of its era.

The castle was built as a fortified dwelling for Bohemian nobility during a period when the distinction between military structures and comfortable residences blurred. Its preserved construction reflects this transitional phase in Czech architectural history.

The name Koldín is shared by the village and its castle, and the building has long been tied to the estate rather than to a resident noble family. After 1637 it served as the seat of estate officials, and a 1682 inventory lists rooms, cellars, a small chapel and an old distillery. Since 1991 it has belonged to the heirs of J. Zámečník, who began repairs.

The site is located in the village of Koldín and is most easily reached on foot from the village center. Access to the building itself depends on current visiting conditions and should be checked in advance.

The 1682 inventory of the Častolovice estate described Koldín as a "fortress with chambers, cellars dry and underground, an old distillery and a ruinous building at the lower gate". The ground-floor arcades were later walled up, the chapel abolished and the first-floor interiors rearranged; a fire struck the building in 1829.