One room is dedicated to Giacomo Casanova, who was employed here as a librarian from 1785 to 1798, and his memoirs Histoire de ma vie were written here in the years before his death in 1798.
The chateau was initially built as a fort in the 13th century by the Hrabišic family, which resided at the Osek Castle.
Their son Jan Bedřich of Waldstein, later the Archbishop of Prague, was apprised with the French architect and painter Jean Baptiste Mathey, and he brought him to Duchcov for the purpose of rebuilding the residence.
The decoration of the building was provided by the best Baroque artists in Bohemia, like the sculptors Matthias Braun, Ferdinand Brokoff, and painter Wenzel Lorenz Reiner.
[2] Between 1785 and 1798, Giacomo Casanova, the so-called secretary of the 18th century, spent the last thirteen years of his life in Duchcov.