Originally a late medieval fortress of Kaplíř of Sulevice, rebuilt into a Baroque castle in 1681 by John George Kulhanek of Klaudenstein in the Rococo style in the 2nd half of the 18th century for Count John Francis Kulhanek of Klaudenstein. From the year 1796 in the property of the Knights of Korb from Weidneheim. The last private owner was the Swiss consul Gérold Deteindre, his descendants kept Stekník until 1949. After 1949, the castle was purchased by Czechoslovakia and was the castle began to be used by the Hop-growing Research Institute in Žatec. Later it was used by the National Gallery in Prague. In 1997, it was transferred to the administration of the National Heritage Institute, who still manages it today. The newly renovated spaces: castle chapel and the hall of the first floor are accessible. You can also look into the salons of the southern and western wings of the castle with a guide (collection of historic strollers). You can see the ground floor corridor of the castle, where the exhibition space is located, separately. The castle is surrounded from the south and west side by an Italian terraced garden from the 2nd half of the 18th century.