Mathematicians, a task for you here please construct using measurements described in the text below "kingdom of heaven" "For the day shall cometh when it shall be built" It is important to distinguish between "the camp of the saints, and the beloved city" spoken of in Revelation ch.20:9, and the New Jerusalem of chapter 21. Rev.ch.20:9 refers to an earthly City, description and purpose of which is found in book of Ezekiel, starting with chapter 36 and ending with ch.48. One of the most obvious differences is, the dimensions of the New Jerusalem of Rev.ch.21 are 1000 times bigger than dimensions of the city in Ezekiel ch.48 (and in Rev.ch.20:9) New Jerusalem of Revelation ch.21 is 2225 km. in length, width, and height, a city of these gigantic proportions can not be located on this earth, but as stated in ch.21 comes down from heaven on to the new earth. "source wiki" According to John, the New Jerusalem is "pure gold, like clear glass" and its "brilliance [is] like a very costly stone, as a stone of crystal-clear jasper." The street of the city is also made of "pure gold, like transparent glass". The base of the city is laid out in a square and surrounded by a wall made of jasper. It says in Revelation 21:16 that the height, length, and width are of equal dimensions - as were the Holy of Holies in the Tabernacle and First Temple - and they measure 12,000 furlongs which is approximately 1500.3 miles). John writes that the wall is 144 cubits, which is assumed to be the width since the length is mentioned previously. 144 cubits are about equal to 65 meters, or 72 yards. It is important to note that 12 is the square root of 144. The number 12 was very important to early Jews and Christians, representing the 12 tribes of Israel and 12 Apostles of Jesus Christ. The four sides of the city represented the four cardinal directions (North, South, East, and West.) In this way, New Jerusalem was thought of as an inclusive place, with gates accepting all of the 12 tribes of Israel from all corners of the earth. There is no temple building in the New Jerusalem. God and the Lamb are the city's temple, since they are worshiped everywhere. Revelation 22 goes on to describe a river of the water of life that flows down the middle of the great street of the city from the Throne of God. The tree of life grows in the middle of this street and on either side, or in the middle of the street and on either side of the river. The tree bears twelve fruits, or kinds of fruits, and yields its fruit every month. According to John, "The leaves of the tree were for the healing of the nations." This inclusion of the tree of life in the New Jerusalem harkens back to the Garden of Eden. The fruit the tree bears may be the fruit of life. John states that the New Jerusalem will be free of sin. The servants of God will have theosis, and "His name will be on their foreheads." Night will no longer fall, and the inhabitants of the city will "have need no lamp nor light of the sun, for the Lord God gives them light." John ends his account of the New Jerusalem by stressing its eternal nature: "And they shall reign forever and ever." Gates There are twelve gates in the wall oriented to the compass with three each on the east, north, south, and west sides. There is an angel at each gate, or gatehouse. These gates are each made of a single pearl, giving them the name of the "pearly gates". The names of the twelve tribes of Israel are written on these gates. The new Jerusalem gates may bear some relation to the gates mentioned in Enoch, Chapters 33 - 35, where the prophet reports (at the extremities of the whole earth) "heavenly gates opening into heaven; three of them distinctly separated." [33, 3.] And so on for each of the four major compass directions.[ref. Laurence translation, Book of Enoch.] "source wiki"