Ganden monastery, the greatest and the oldest of the six Gelug Sect's monasteries, is called one of "the three principal monasteries in Lhasa" along with the Drepung Monastery and Sera Monastery. It locates on Wangbur Mountain, on the southern bank of Lhasa River in Tagtse County, 47 kilometers (29 miles) from Lhasa City. It stands 12,467 feet above sea level on the Wangbur Mountain. It is in typical Tibetan style and three times as large as Potala Palace. At its peak, it had a registration of more than 4,000 monks. The founder of Gelug Sect, Tsong Khapa, established this monastery as the first Gelug monastery in the early 15th century. In 1733, Emperor Yongzhen of Qing dynasty bestowed the name "Yongtai". And Gandenpai, Gelug Sect's original name, which means exhortation, also named after the Ganden Monastery.