A small castle built from 1666 -1668 on a basalt hill at Sobotka. It was built as an imitation of the Galata Tower in Istanbul with an elliptical floor plan. Černínský oval hall is noteworthy for its acoustics – in it, sound resonates with multiplied power. Wall paintings noting the life of Heřman and Humprecht Černín of Chudenice. Exhibition of the noble Černín family and the museum of the Sobotka region.