Pabongkha, or the Maru Palace, lies on Wuduk Hill on the north side of Lhasa city, in Nyangdren of Lhasa District. The palace is said to have been built in the 7th century during the time of King Songtsen Gampo. Tönmi Sambhota, the minister of King Songtsen Gampo, lived here for a long time, during which he invented Tibetan language as well as translated the twenty-one sutras and tantras of Avalokiteshvara. In the palace is the famous six letter mani mantra written by Tönmi Sambhota and also many self-arisen objects of worship.