Tawang Monastery, located in Tawang city of Tawang district in the Indian state of Arunachal Pradesh, is the largest monastery in India and second largest in the world after the Potala Palace in Lhasa, Tibet. It is situated in the valley of the Tawang River, near the small town of the same name in the northwestern part of Arunachal Pradesh, in close proximity to the Tibetan and Bhutanese border.

Tawang Monastery is known in Tibetan as Gaden Namgyal Lhatse, which translates to "celestial paradise in a clear night." It was founded by Merak Lama Lodre Gyatso in 1680-1681[citation needed] in accordance with the wishes of the 5th Dalai Lama, Ngawang Lobsang Gyatso. It belongs to the Gelug school of Mahayana Buddhism and had a religious association with Drepung Monastery of Lhasa, which continued during the period of British rule.

The monastery is three stories high. It is enclosed by a 925 feet (282 m) long compound wall. Within the complex there are 65 residential buildings. The library of the monastery has valuable old scriptures, mainly Kangyur and Tengyur.