In the heart of Frankfurt's Old Town (Altstadt), the Römerberg is an irregularly shaped square with the Justice Fountain (Gerechtigkeitsbrunnen) at its center. Not only is it Frankfurt's most picturesque public square, it's the city's busiest pedestrian zone, home to numerous tourist attractions from its many Kulturschirn, a form of open-fronted shop once common throughout the old town, to the Römer, a complex of 11 lovely old buildings from the 15th to 18th centuries that include the Old Town Hall (Altes Rathaus) with its Imperial Hall (Kaisersaal), once the scene of splendid banquets. Other notable buildings include the New Town Hall (Neues Rathaus) from 1908, the 14th-century Gothic Church of St. Leonhard, and St. Nicholas Church, notable for its carillon. Also of interest are the Historical Museum (Historisches Museum), founded in 1878 with its collections related to Frankfurt's rich cultural history from medieval to modern times, and the six traditional-style buildings of the Ostzeile.