The last three palaces are the general names of Gan Qing Palace, Jiaotai Palace, Kunning Palace and their related areas, including the square in front of Gan Qing in the south and Kunning Gate in the north, with Gan Qing Palace, Jiaotai Palace and Kunning Palace as the main bodies and located on the central axis. The last three palaces are located on the central axis of the first three halls and are the central buildings of the palace. Surrounded by the gate, the plane is rectangular, with a length of about 220m from north to south and a width of about 120m from east to west, with an area of 26,000m2 and more than 420 houses.
Gan Qing Palace is one of the last three palaces in the imperial palace. Founded in the 18th year of Yongle in Ming Dynasty, it was rebuilt in Ming and Qing Dynasties because it was burned down many times. The existing buildings were built in the third year of Jiaqing in Qing Dynasty. Gan Qing Palace is the roof of a yellow glazed tile double-eaved palace, which is located on a single marble platform. The corridor is 9 rooms wide and 5 rooms deep, with a building area of 1400㎡ and a height of more than 20 meters from the table top to the roof.
There are nine ridged beasts in the eaves. The upper floor stands upright on the bucket with seven steps, and the lower floor stands upright on the bucket with five steps. It is decorated with golden dragons and seals, and separated by six rhombic doors and windows.
Jiaotai Palace is one of the last three palaces in the Forbidden City. Jiaotai Hall is square in plane, 3 rooms deep and 3 rooms wide, with a pyramid roof with one eaves and four corners, a gold-plated copper roof, yellow glazed tiles, double-sided arches, dragons and phoenixes decorated with beams and painted seals. There are four sides, three intersecting six diamonds, four doors on the dragon and phoenix skirt, sill windows on the south side and walls on the other three sides. At the top of the hall is a pearl-holding algae well with gold bricks on the ground. In the Ming Dynasty, there was a throne with a "inaction" plaque inscribed by Emperor Kangxi, and there was a board screen behind the throne with the inscription of Jiaotai Hall written by Emperor Qianlong. A copper pot is set in the east to drip water, which will not be used after years of dry growth. Dzmz was set between the Western Dynasties, and the palace time was based on this.
Kunning Palace is one of the last three palaces in the Forbidden City. Kunning Palace is the queen's master bedroom, but it was restructured according to Manchu customs in Qing Dynasty. Dongnuange was used as the bridal chamber of the emperor's wedding, but the queen no longer lived here on weekdays. Kunning Palace was mainly used as a place for daily shamanism sacrifice. The northernmost part of the Housangong District is the Kunning Gate leading to the Imperial Garden.