Kladno Chateau, Cultural monument in Kladno, Czech Republic.

Kladno Chateau is a three-wing building with two stories resting on Gothic basement foundations and displaying Czech Baroque architectural elements throughout. Inside, it houses the City Gallery, the Sladecek Homeland Museum, and a branch of the City Library, which fill it with cultural functions.

A Gothic fortress from the 14th century, seat of the Kladenský z Kladna family, stood here first. Jiří Žďárský ze Žďáru had it rebuilt as a Renaissance chateau finished in 1566. After 1705, when the Břevnov monastery took over the estate, Kilián Ignác Dientzenhofer designed the Baroque form: the fortifications and the south wing with its cylindrical tower gave way, and exterior work was largely done by 1740 under abbot Benno Löbl.

The chapel is dedicated to St. Lawrence and its corridors and chapel were decorated with frescoes by Karel Kovář during the interior works that followed the exterior renovation completed in 1740 under abbot Benno Löbl. The chateau passed to the Břevnov monastery in 1705, and the monastic abbots Otmar Daniel Zinke and then Löbl directed its rebuilding.

The chateau stands in Zádušní Street, with the Gothic cellars of the older Hořejší tvrz preserved in the garden about twenty metres west of the building. The south wing with its cylindrical tower was demolished during the Baroque reconstruction, so the present ground plan is smaller than the Renaissance one.

The Hořejší tvrz, the family's original seat, stood in the chateau garden; its Gothic cellars survive about twenty metres west of the chateau. The name Hořejší belongs to that fortress, not to the chateau itself, which was built from a different stronghold.