Bay Chapel of the Old Town Hall
The historical core of the town hall consists of a Gothic tower added on to Volflin's former house in c. 1364 when it became a new dominant feature of the square. On the east side the tower connects to the town hall chapel of the Virgin Mary and the Patrons of Bohemia, consecrated in 1381 and equipped with a grand bay opening towards the square. The chapel is one of the so-called Wenceslas' monuments, as shown by the heraldic symbols of Wenceslas IV decorating the interior – torses and kingfishers. During the reign of Wladyslaw Jagiello the chapel was rebuilt and consecrated again in 1481.
The Gothic core of the original town hall was largely ruined during the May Uprising in 1945. The bay of the chapel suffered the collapse of most of the masonry between the windows. The sandstone statue of the Virgin Mary was also damaged, the so-called Madonna of the Old Town Hall, an important Gothic monument from the 14th century (after the war it was deposited in the Prague City Museum).
The reconstruction on the tower started shortly after the war, between 1945–1947, and it included both the chapel and the astronomical clock.