The picture-book complex of medieval half-timber buildings, with windows large and small and flowers in tubs, is one of the best-preserved town halls in the country, as well as one of the most historically important. It was here, in the imposing Gothic Reichssaal (Imperial Hall), that the Perpetual Imperial Diet met from 1663 to 1806. This parliament of sorts consisted of the emperor, the electors (seven or eight), the princes (about 50), and the burghers, who assembled to discuss and determine the affairs of the far-reaching German lands of the Holy Roman Empire. The hall is sumptuously appointed with tapestries, flags, and heraldic designs. Note the wood ceiling, built in 1408, and the different elevations for the various estates. The Reichssaal is occasionally used for concerts. The neighboring Ratssaal (Council Room) is where the electors met for their consultations. The cellar holds the city's torture chamber; the Fragstatt (Questioning Room); and the execution room, called the Armesünderstübchen (Poor Sinners' Room). Any prisoner who withstood three degrees of questioning without confessing was considered innocent and released—which tells you something about medieval notions of justice.