Fürstenfeldbruck is a town in Bavaria, Germany, located 32 kilometres west of Munich. It is the capital of the district of Fürstenfeldbruck. As of 2004 it has a population of 35,494. Since the 1930s, Fürstenfeldbruck has had an air force base.

The Amper, called the Ammer upstream of the Ammersee, through which it runs, is the largest tributary of the Isar in southern Bavaria, Germany. It flows generally north-eastward, reaching the Isar in Moosburg, about 185 kilometres (115 mi) from its source in the Ammergau Alps, with a flow of 45 m³/s. Including its tributary, Linder, it is 209.5 km (130.2 mi) long. Major tributaries are the Glonn, which rises near Augsburg; the Würm, which is the outflow of Lake Starnberg; and the Maisach.