After the Battle of White Mountain during the Thirty Years' War, the remains of the castle were confiscated and by 1630 granted to the Metternich family.
From 1682 to 1691, Count Philipp Emmerich von Metternich (1621-1698) turned the decayed ruins into a Baroque residence.
From 1821 to 1836, the Austrian Chancellor Klemens Wenzel von Metternich remodeled the building in the neoclassical style with the help of architect Pietro Nobile.
[1] In 1828, a museum was founded to display the castle's natural science collections, coins, historical and technological curiosities, manuscripts, ancient Egyptian monuments, marble sculptures, and pieces of Oriental art.
Since 1830 the castle has been home to the mummified remains of Qenamūn an Egyptian man who most likely lived during the Eighteenth Dynasty of Egypt.