Svirzh Castle, Medieval fortress near Svirzh, Ukraine.

Svirzh Castle is a stone fortress on elevated ground with white walls, purple roof tiles, and multiple defensive towers surrounding an inner courtyard. The structure is surrounded by lakes, moats, and marshland that enhance its defensive position.

The Świrski family established the original structure in the late 15th century, which later underwent major reconstruction under Count Aleksander Cetner. These changes reflect the evolution of defensive techniques over several generations.

The castle church, founded in the 15th century, was rebuilt in Renaissance style in 1546 (or 1541, sources differ). Above the entrance, remnants of the noble coat of arms of former owners are visible. A 1956 account describes frescoes uncovered inside, possibly depicting Mary of Egypt; their later fate is unknown.

The castle is not closed: the Union of Architects of Ukraine has long cared for the building and grounds, and the interior is used for events and film shoots. Access is arranged through the Union, which draws on private donors and grants. The castle stands in Svirzh, Peremyshliany district, Lviv Oblast, on Mount Belz above ponds and moats.

In 1978 the castle served as several locations in the film D'Artagnan and the Three Musketeers: D'Artagnan's Gascon home, the Bethune convent where Constance is poisoned, the executioner's house and the Saint-Gervais bastion at La Rochelle. Later shoots included Hetman (2014) and Dovbush (2019).