Gate of Heavenly Purity
The Gate of Heavenly Purity (Qianqing Men) separates the palace into the Outer and Inner Court. Behind the gate is the residential area of the palace. In front of the gate stands a pair of golden lions, a little smaller than those guarding the Gate of Supreme Harmony. The mighty lions, in the opinion of Chinese people, are extraordinary gate-guarders which frighten devils away. Beside the lions, ten huge golden vats are laid. These golden vats are not only garnitures but also hold water in case of fire. These vats weigh over 2,000 kilograms (4,409 pounds) and can hold more than 2,000 kilograms (4,409 pounds) of water.
The Gate of Heavenly Purity was established in 1420 and rebuilt in 1655. Five bays wide, three bays deep and sixteen meters high, the Gate of Heavenly Purity is a structure with single-eaved roof, resting on the 1.5-meter-high white marble base of Buddhist-style building surrounded by carved stone balustrades. Outside the gate there are four huge gleaming, gilded bronze vats. Although they are decorative, their prime function was to hold vast amount of water to fight the outbreak of fire. Each of these vats weighs four tons and would contain over two hundred gallons of water. Three hundred and eight vats spread around the Forbidden City, twenty-two of which are of the same design as those seen by this gate.
During the Qing Dynasty (1644-1911), Emperor Kangxi, the second successor, began to hold court at this gate instead of the Gate of Supreme Harmony. Ministers used to gather outside the gate at dawn, report the state affairs to their emperor and await the emperor's decision. The Upper Study, in the east, was where princes studied in the Qing Dynasty. In the west, the smaller houses were the offices of the General Command Centre (Junji Chu), initially a military institution. Later the area saw the enaction of national decrees