Zanskar is a subdistrict or tehsil of the Kargil district, which lies in the eastern half of the Indian state of Jammu and Kashmir. The administrative centre is Padum. Zanskar, together with the neighbouring region of Ladakh, was briefly a part of the kingdom of Guge in Western Tibet. Zanskar covers an area of some 7,000 square kilometres, at a height of between 3,500 and 7,000 metres. In the mid-20th century, border conflicts between India, Pakistan, and China caused Ladakh and Zanskar to be closed to foreigners. During these wars Ladakh lost two thirds of its original territory, losing Baltistan to Pakistan and the Aksai Chin to China. Ladakh and Zanskar, despite a tumultuous history of internal wars and external aggressions, have never lost their cultural and religious heritage since the 8th century.