Roudnice Castle was built in the 12th century by Bishop Jindřich Břetislav, the nephew of the Czech king Vladislav I, to protected an important trade route from Prague to Upper Lusatia along the Elbe
Roudnice Castle was built in the 12th century by Bishop Jindřich Břetislav, the nephew of the Czech king Vladislav I, to protected an important trade route from Prague to Upper Lusatia along the Elbe. The castle complex included several farm buildings, protected by a fortified wall; the castle itself had walls that were two meters thick, and watch towers in each corner. In the mid-14th century, it was rebuilt in a Gothic style and became a favorite summer residence for Prague bishops. It is said that Jan Hus was ordained as a priest there.
In 1421, the Catholic Church sold the castle to Jan Smiřický, who renovated it once again. George of Poděbrady, king of Bohemia (1420-1477), captured Roudnice from Smiřický in 1467. It passed into the ownership of William Rožumberk (1535-1592), the Supreme Burgrave and one of the wealthiest men in Bohemia. After Rožumberk’s death, his widow Polyxena Pernštejn (1566-1642) married Zdenek Vojtěch of Lobkowicz, Chancellor of the Czech Kingdom and later 1st Prince Lobkowicz, bringing Roudnice into the Lobkowicz family’s possessions. In 1652 their son Václav Eusebius, 2nd Prince Lobkowicz (1609-1677), embarked upon an ambitious project to transform the castle into an early baroque palace. From 1657 until the Second World War the Lobkowicz Collection's library was stored in Roudnice Castle, leading to the library being named the Roudnice Lobkowicz Library.