Sirotčí hrádek, Gothic castle ruin in Klentnice, Czech Republic

Sirotčí hrádek is a Gothic castle ruin that sits on a limestone hill near Klentnice in South Moravia. The remains include walls with window openings and a multi-story palace structure built across two rocky outcrops.

Knight Siegfried Sirotek founded the castle in the 13th century, and it later changed hands several times, including under King Wenceslas III and the Dietrichstein family, before abandonment in 1575.

This cultural monument includes remains of an eight-meter-high wall with window openings and a three-story palace built across two limestone cliffs.

Three marked trails lead to the ruin: a red route from Mikulov to Strachotín, a yellow local path around Klentnice and a green path from Klentnice to Perná. A village road reaches the trail junction below the castle, officially open to cyclists but in practice only rideable on a mountain bike; a bike rack and a bar stand at the junction. The northern cliff is not accessible.

The castle was built on two limestone crags split by a deep gorge, with the main three-storey palace on the southern rock and a prismatic watchtower on the northern one, which is now inaccessible. A bridge probably crossed the gorge, and a cistern cut into the rock supplied water.