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Located at the center of Beijing, the Forbidden City, also called gu gong in Chinese, was the imperial palace during the Ming and Qing Dynasties. In the shape of rectangle, it is the largest palace complex on earth. It is surrounded by a six-meter-deep moat and ten-meter-high city walls. There is a gate on each side of the walls, and on each of the four comers there is a unique and delicately structured tower. The Forbidden City is divided into two parts. The southern part, or the Outer Court, was where the emperor exercised his supreme power over the nation. While the northern part, or the Inner Court, was where the emperor and his family lived. Nowaday, the Forbidden City is open to welcome tourists from home and abroad.