Part of the Clementinum complex, Cathedral of St. Clement is a beautiful and richly decorated Baroque church, dating back to the beginning of the 18th century. Though its exterior may seem a bit plain, the interior is worth visiting for exquisite Matthias Braun's sculptures and Petr Brandl's paintings.
Guided tours: upon request only
Wikipedia https://en.wikipedia.org/wiki/St._Clement's_Cathedral,_Prague
Official website http://reckokat.cz/exarchat/eng.html
More information http://www.prague.eu/en/object/places/453/cathedral-of-st-clement-katedrala-sv-klimenta?back=1
Address Karlova 190/1 (Klementinum), 110 00 Prague 1, Czech Republic
Coordinates 50°5'10.469" N 14°24'57.822" E