Leh was an important stopover on trade routes along the Indus Valley between Tibet to the east, Kashmir to the west and also between India and China for centuries. The main goods carried were salt, grain, pashm or cashmere wool, charas or cannabis resin from the Tarim Basin, indigo, silk yarn and Banaras brocade.
Although there are a few indications that the Chinese knew of a trade route through Ladakh to India as early as the Kushan period (1st to 3rd centuries AD), and certainly by Tang dynasty, little is actually known of the history of the region before the formation of the kingdom towards the end of the 10th century by the Tibetan prince, Skyid lde nyima gon (or Nyima gon), a grandson of the anti-Buddhist Tibetan king, Langdarma (r. c. 838 to 841). He conquered Western Tibet although his army originally numbered only 300 men. Several towns and castles are said to have been founded by Nyima gon and he apparently ordered the construction of the main sculptures at Shey. "In an inscription he says he had them made for the religious benefit of the Tsanpo (the dynastical name of his father and ancestors), and of all the people of Ngaris (Western Tibet). This shows that already in this generation Langdarma's opposition to Buddhism had disappeared." Shey, just 15 km east of modern Leh, was the ancient seat of the Ladakhi kings.
During the reign of Delegs Namgyal (1660–1685), the Nawab of Kashmir, which was then a province in the Mogul Empire, arranged for the Mongol army to (temporarily) leave Ladakh (though it returned later). As payment for assisting Delegs Namgyal, the Nawab made a number of onerous demands. One of the least was to build a large Sunni Muslim mosque in Leh at the upper end of the bazaar in Leh, below the Leh Palace. The mosque reflects a mixture of Islamic and Tibetan architecture and can accommodate more than 500 people. This was apparently not the first mosque in Leh; there are two smaller ones which are said to be older
