The origins of this massive complex -- now part of a university -- dates back to the 12th and 13th centuries, but it's best known as the stronghold of the Jesuits, who occupied it for more than 200 years beginning in the early 1600s. Despite many buildings being closed to the public, the sites here are well worth a visit. The Jesuits built a resplendent library, displaying fabulous ceiling murals that portray the three levels of knowledge, with the "Dome of Wisdom" as a centerpiece. Next door, the Mirror Chapel is a dazzling symphony of reflective surfaces, with acoustics to match. Mozart played here, and the space still hosts occasional chamber music concerts. The Astronomical Tower in the middle of the complex was used by Johannes Kepler, and afterward functioned as the "Prague Meridian" where the time was set each day. At high noon, a timekeeper would appear on the balcony and wave a flag that could be seen from the castle, where a cannon was fired to mark the hour.
Visit the Travel Talk forums for help on planning your trip >>
