The Carpathian Basin marked with a III.
The Carpathian Basin is a large basin in Central Europe, located to the west and south of the Transylvanian plateau. Also known as the "Pannonian Basin", the basin centers on the country of Hungary, but it also extends to Ukraine, Romania, Serbia, Croatia, Slovakia, Slovenia, and Austria. The Magyars settled in the Carpathian Basin in the late 9th century under Arpad, and the region is the home of the Hungarian people.