In contrast to many other cities, the municipal area of Regensburg is quite homogeneous and compact. Its structure is mainly formed by the historic city center, the large gardens and parks and the Danube islands "Oberer Wöhrd" and "Unterer Wöhrd".
Until the beginning of the 19th century, Regensburg was limited to the area of the Roman camp as well as some areas in the west. In 1810, "Kumpfmühl" was incorporated and Regensburg increased southwards. Since the beginning of the 20th century, many previously independent areas became part of Regensburg. Now, Regensburg has 18 districts many of which are mainly residential areas.