The Prague City Gallery is a contributory organization which was established by the Prague City Council and organizes exhibitions in several buildings in Prague. Its exhibition activities focus mainly on modern and contemporary art, but it is also responsible for Prague's monuments, sculptures, and fountains. In addition to exhibitions, GHMP organizes guided tours, workshops, debates, and other cultural events and publishes its own quarterly magazine Qartal. The Municipal Library on Mariánské náměstí was built between 1925 and 1928 based on a design by architect František Roith, a pupil of Otto Wagner, a professor at the Academy of Fine Arts in Vienna. The building was conceived as a cultural institution with a wide range of uses including exhibition, lecture, and concert halls. The extensive exhibition space on the second floor of the building was acquired by the Prague City Gallery in 1992.