Augsburg, Bavaria is one of Germany’s oldest cities. The varied architecture in its centre includes medieval guild houses, the 11th-century St. Mary's cathedral and the onion-domed Sankt Ulrich und Afra abbey. Key Renaissance buildings are the Augsburger Town Hall with its Golden Hall. The Fuggerhaüser is the seat of a wealthy banking dynasty and the Fuggerei is a 16th-century social housing complex.