Josef Mocker between 1887 and 1899, giving the castle its present look.
The nearby village was founded during the construction of the castle and bore its name until it was renamed to Buda in the wake of the Hussite Wars. Renamed to Budňany in the 18th century, it was merged with Poučník and called Karlštejn (Beroun District). There is a golf club named after the castle nearby
