Hrádek Castle, Medieval château in Hrádek u Sušice, Czech Republic.

Hrádek Castle in Hrádek u Sušice is a former fortress rebuilt as a château. Its core is the old château: two parallel one-storey wings with Renaissance gables and remnants of sgraffito plaster, vaulted interiors with barrel and groin vaults. A three-winged new château stands to the south, with a projecting entrance portal and a dog-leg staircase lined with angel statues; the Chapel of St Walburga adjoins the west facade.

A fortress existed here in the 14th century, held by Sezima and Protiva of Hrádek; from 1371 the village belonged to the Velhartice estate, and its wardens Matěj (1407–1408) and Ojíř of Vlčkovice (1415) lived in the fortress before it fell derelict. Around 1560 Hrádek passed to Jan Rendl of Úšava and then to the Vlčkovice family; after 1568 the brothers Vojtěch and Jan Račín of Račín rebuilt the old fortress in Renaissance style. Bedřich Desfours added the Baroque new château and altered the west wing, the Chapel of St Walburga was built in 1775, and classicist changes around 1800 gave the castle its present form. The Henneberks owned it until 1945; after 2000 Pavel Lejsek restored it.

The castle's name comes from the Old Czech word hrádek, meaning "small castle". The chapel of Saint Walburga, added in 1775, stands against the west facade of the old palace, and a small Baroque chapel of Saints John of Nepomuk and Wenceslaus also stands in the grounds. Since 2000 the complex has housed a hotel, spa and restaurant, with part open to the public.

The castle stands in the centre of a large grounds: the old palace with its two parallel wings and Renaissance gables, the chapel of St Walburga attached to the west front, and the three-winged new palace to the south. A long former servants' building adjoins the north wing; the park lies to the south, farm buildings and a former garden to the north. Since 2000 the site has housed a hotel, spa and restaurant, with part open to the public.

Two corner bastions in the southern corners of the perimeter wall are, according to August Sedláček, the last remains of a second fortress at Hrádek; nothing else of it survives. The site also holds a small Baroque chapel of St John of Nepomuk and St Wenceslas beside the main buildings.