"One of Frankfurt’s most important landmarks, the medieval Römer building is a significant part of the Römerplatz (Römer Square) in the Altstadt (Old Town). Located opposite Old St. Nicholas Church, it’s served as Frankfurt’s city hall for more than 600 years, though it’s naturally undergone some modifications in that time. Comprising several houses and six courtyards from different eras, the three-story complex currently spans some 107,639 square feet. While it once functioned as a trading hub and venue for Frankfurt’s famous book fairs, it’s now more typically used for weddings and official functions. The various rooms, which include a restored Kaisersaal (Emperor Hall), are not normally open to the public, but the building is worth a visit if only to snap a photo of the iconic three-peaked neo-Gothic facade."