Römer
Römer, the German word for Roman, is a complex of nine houses that form the Frankfurt city hall (Rathaus). The houses were acquired by the city council in 1405 from a wealthy merchant family. The middle house became the city hall and was later connected with its neighbours. The Kaisersaal ("Emperor's Hall") is located on the upper floor and is where the newly crowned emperors held their banquets. The Römer was partially destroyed in World War II and later rebuilt. The surrounding square, the Römerberg, is named after the city hall.
The former Altstadt (old town) quarter between the Römer and the Frankfurt Cathedral was to be redeveloped as the Dom-Römer Quarter through 2016, including reconstructions of historical buildings that were destroyed during World War II.
Source: wikipedia