Kosava Castle, Gothic Revival palace in Kosava, Belarus

Kosava Castle is a Gothic Revival palace on a family estate in Kosava, Belarus, built with a central two-story structure, two wings, and four tall towers. The building contains over one hundred separate rooms distributed throughout its layout.

Wojciech Pusłowski bought the Kosava estate in 1821 and began building the palace in 1830; his son Wandalin continued the work. The Warsaw architect Franciszek Jaszczołd designed it, Władysław Marconi later directed reconstruction, and the palace was completed in 1838. After the January Uprising, Russian authorities confiscated it and gave it to the Trubetskoy family.

The palace contained specialized chambers for different activities, each decorated and designed for its purpose—the White Chamber for dancing, the Black Chamber for card games, and the Pink Chamber for musical performances. This arrangement reflects how the residents organized their social and leisure activities.

Reconstruction began in 2007 after revaluation plans were completed, and the palace is open to visitors while work continues. A combined ticket covers both the Puslowski Palace and the Kosciuszko manor. The site lies about three kilometres from the centre of Kosava, and the palace is part of the EuroVelo cycling route.

The palace was built on an artificially created hill, and the whole palace-and-park ensemble covered 40 hectares. Its symmetry axis ran through the entrance portico, flowerbeds, alleys, the palace and terraces, ending at a lake with an island. Visitors entered the grounds through three porticos: the main one faced Ruzhany, the Northern one faced north, and the Hunting portico faced Kosava.