Čachtice Castle (Slovak pronunciation: [ˈt͡ʃaxcit͡se]; Slovak: Čachtický hrad, Hungarian: Csejte vára) is a castle ruin in Slovakia next to the village of Čachtice. It stands on a hill featuring rare plants, and has been declared a national nature reserve for this reason. The castle was a residence and later the prison of the Countess and alleged serial killer Elizabeth Báthory.Čachtice was built in the mid-13th century by Kazimir from the Hont-Pázmány gens as a sentry on the road to Moravia. Later, it belonged to Matthew Csák, the Stibor family, and then to Elizabeth Báthory. Čachtice, its surrounding lands and villages, was a wedding gift from the Nádasdy family upon Elizabeth's marriage to Ferenc Nádasdy in 1575.
Originally, Čachtice was a Romanesque castle with an interesting horseshoe-shaped residence tower. It was turned into a Gothic castle later and its size was increased in the 15th and 16th centuries. A Renaissance renovation followed in the 17th century. In 1708 the castle was captured by the rebels of Francis II Rákóczi. It was neglected and burned down in 1799. It was left to decay until it was turned into a tourist attraction in 2014.