The Old town of Regensburg with Stadtamhof is inscribed on the UNESCO World Heritage list since 2006. Located on the Danube River in Bavaria, this medieval town contains many buildings of exceptional quality that testify to its history as a trading centre and its influence on the region from the 9th century. A notable number of historic structures span some two millennia and include ancient Roman, Romanesque and Gothic buildings. Regensburg´s 11th-13th century architecture – including the market, the city hall and cathedral – still defines the character of the town marked by tall buildings, dark and narrow lanes and strong fortifications. The buildings include medieval patrician houses and towers, a large number of churches and monastic ensembles as well as the 12th century Old Stone bridge.