Zemun is a historical town and one of the 17 municipalities which constitute the City of Belgrade, the capital of Serbia. Before 1934, it was a town separate from Belgrade. The development of New Belgrade in the late 20th century joined them together in a continuous urban area. In ancient times, the Celtic and Roman settlement was known as Taurunum. The Frankish chroniclers of the Crusades mentioned it as Mallevila, a toponym from the 9th century.