In the Ming Dynasty, Waqiu was a three-layer blue glazed round altar, which was expanded in the 14th year of Qing Qianlong (1749). The blue glazed table top was changed to a bluestone table top, with mugwort leaves, white marble columns and columns. The dome is as round as the sky, and consists of three altars, with a height of 5.17m, a lower diameter of 54.92m and an upper diameter of 23.65m. Each floor has nine steps on all sides. In the center of the upper layer is a round stone, nine circles of fan-shaped stones and nine inner rings, which extend outward in turn in multiples of nine. Fences and observation posts also use multiples of 9 to symbolize days.
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The Temple of Heaven is the largest architectural complex dedicated to heaven in the world. The Temple of Heaven has two walls, divided into an inner altar and an outer altar. The main buildings are concentrated in the inner altar. The Temple of Heaven is mainly built on the north-south axis of the inner altar, and the dome altar is in the south, which is dedicated to the Temple of Heaven, including the dome and the imperial vault. In the north, there are prayer halls, prayer halls and prayer gates. , across the wall.
The two altars are connected by a single bridge (also known as Haiyuan Avenue or Shinto Road) with a length of 360 meters, a width of nearly 30 meters and a height of low in the south and high in the north. On both sides of the single bridge is a large area of ancient Berlin. There is a fasting palace on the west wall of the inner altar, which is the residence of the former emperors who fasted. On the west wall of the outer altar, there is a God Music Department and a Sacrifice Center. The main buildings in the altar include the Hall of Prayer for the New Year, Huanggan Hall, Dome, Royal Dome, Zhai Palace, Infinite Hall, Promenade, Double Ring Wanshou Pavilion, and other places of interest, such as Echo Wall, Sanyin Stone and Seven Star Stone.