The Astronomical Tower of the Clementinum is one of Prague’s most distinctive historic landmarks. Standing 68 metres high, the tower was completed in 1722 as part of the former Jesuit college complex in the Old Town. Its history is closely connected with astronomy, mathematics and meteorological observations. From around 1750, the tower was equipped with astronomical instruments, while systematic meteorological measurements began in 1775. The tower also played an unusual role in city life: for more than 80 years, a signal from its gallery announced noon to Prague residents.
The architecture combines early Baroque elements with an impressive domed roof crowned by a large statue of Atlas carrying a celestial sphere. Visitors can also see historic scientific instruments and the Meridian Hall, where solar noon was determined using a narrow beam of sunlight.
The Best View from the Clementinum
One of the main reasons to visit the Astronomical Tower is its viewing gallery, reached by climbing 172 steps. From approximately 52 metres above the ground, visitors can enjoy panoramic views across Prague’s historic centre. The red rooftops of the Old Town, Charles Bridge, the Vltava River and Prague Castle create an especially impressive cityscape.
The tower is visited as part of a guided sightseeing route that also includes the famous Baroque Library and Meridian Hall. For travellers interested in Prague history, architecture, science and photography, the Clementinum Astronomical Tower offers a unique combination of cultural heritage and spectacular views.
