Once more look at the round stone in the center. The upper terrace is nine zhang (a Chinese unit of length, one zhang equals 3.3 meters ) in circumference ,while the middle is 15 zhang, the lower, 21 zhang. Classified as yang numbers, the sum of these numerals is 45 zhang which was meant to symbolized success. What is more, by applying the concept of odd numbers and strengthening nine and its multiples, the concept of heaven was thus illustrated and realized . The concept of nine will also be mentioned when we visit some other buildings.
Now I will give you a brief account of what happened here annually on the Inter Solstice. The memorial tablet dedicated to Heaven would be set up on the north side of the terrace, while tablets dedicated to the emperor `s ancestors would be enshrined on the flanks. The service would begin around 4 o` clock in the morning. All of the lanterns would be lit .In the foreground, a sacrificial calf is being barbecued. On the square in front of the altar, the emperor, under heavy escort of nearly a thousand courtiers, princes of royal blood ,musicians, dancers and uniformed soldiers, would slowly ascend the altar to offer sacrifice and pray in honor of Heaven. When the service drew to a close ,the sacrifice offered in front of the memorial tablets would be incinerated .All of participants would watch the thick smoke rise upward as if they were seeing God off .Music and dancing would follow .In the end ,the emperor would return to the Forbidden City secure in the belief that he would be blessed and protected by Heaven until the next winter Solstice.
It is interesting to note that ,the stone in the very middle of the altar was of major importance ,since it was where the emperor used to stand to say his prayer. The stone ,which is known as the God`s heart Stone, is peculiar in that it is characterized by a specific acoustic phenomenon: it made the emperor` s voice clearer and louder, thus adding to the mystic atmosphere of the service .You can try this out by yourself. (Proceed northward to pass through the Lattice StarGate)
(In front of the Gate of glazed tiles)
this structure is known as Heaven` s Storehouse. It is entered through the Gate of glazed Tiles. The roofing ,beams, and brackets are all made of glazed tiles or bricks. This is the only structure of its kind in china today .
the Heaven` s Storehouse was where memorial tablets dedicated to the gods were kept. Douglas Hurd, a former British foreigh secretary ,once said , “God attends to His affairs on the Cir4cular Mound Altar but stays here. ” Now let` s go in to to see it (Go through the left side door)
(In the courtyard of Heaven` s Storehouse)
this is the Imperial Vault of Heaven, the main structure of Heaven` s Storehouse. It was built in 1530 and is 17 meters in height and 19 meters in diameter. The structure feature blue roofs topped by a gilded ball ,and carved wooden doors and windows. It is decorated with colored paintings. Founded on a 3-meter-hign round marble terrace ,the building also features a gigantic carved marble ramp laid in the stone staircase leading up to the front entrance.. The ramp is carved in “Two dragons Playing with a pearl ” design in relief. We will enter the main hall by going up the stone staircase on the eastern side.
(On the marble terrace of the main hall)