Klementinum | Prohlídky Barokní knihovna a Astronomická věž

Baroque library hall was a such a great experience (even if you can’t get in a look throught open door). View from the Astronomical tower to Prague Castle and Old town square was amazing. Worth to visit.

One of the best views from the rooftop and the most beautiful library in the world. U will never regret going there. The price is 300 CZK

You can't go into the Baroque library. Just stare from a door. No photos allowed. Tour guide had bad breath. Not worth 300czk.

The Orloj is mounted on the southern wall of Old Town Hall in the Old Town Square. The clock mechanism has three main components — the astronomical dial, representing the position of the Sun and Moon in the sky and displaying various astronomical details; statues of various Catholic saints stand on either side of the clock; "The Walk of the Apostles", a clockwork hourly show of figures of the Apostles and other moving sculptures, notably a figure of a skeleton, representing Death, striking the time; and a calendar dial with medallions representing the months. According to local legend, the city will suffer if the clock is neglected and its good operation is placed in jeopardy; a ghost, mounted on the clock, was supposed to nod its head in confirmation. According to the legend, the only hope was represented by a boy born on New Year's night.

Impressive machinery - much older than the clock in the Elizabeth Tower (Big Ben) that is proving so hard to repair.