Barkhor Street is the oldest street in Lhasa, as well as the most representative. Drepung Monastery covers an area of 250,000 square meters (about 62 acres) at the foot of Mt. Gambo Utse, some five kilometers (about 3 miles) west of Lhasa. Jokhang Temple is indeed the spiritual center of Tibet. Ganden Monastery is 47 kilometers (29 miles) from Lhasa and is situated on Wangbur Mountain at an altitude of 3,800 meters (12,467 ft). Norbulingka, meaning Jewel Park, was the Summer Palace of Dalai Lamas. Potala Palace was originally built by King. As one of the 'Three Great Monastery' of the Yellow Hat Sect, Sere Monastery is located at the foot of Tatipu Hill, some 3 kilometers (about 1.86 miles) north from Potala Palace.