Island, Indonesia.
It is one of the Lesser Sunda Islands , separated from Bali by the Lombok Strait and from Sumbawa by the Alas Strait. It is 70 mi (115 km) long and 50 mi (80 km) wide and occupies an area of 2,098 sq mi (5,435 sq km). It is divided by two mountain chains; its northern range includes Mount Rindjani (12,224 ft [3,726 m]), Indonesia's tallest mountain. It was ruled by the sultan of Makasar in 1640. The Balinese later seized control and established four kingdoms there; the Dutch ruled the kingdom of Mataram from 1843 and gained control of the entire island by the late 19th century. Following World War II, it became part of Indonesia.