Revelation 21:12-19

It had a massive and high wall, with twelve [large] gates, and at the gates [were stationed] twelve angels; and on the gates the names of the twelve tribes of the sons of Israel were written. [Ex 28:21; Ezek 48:30-34] On the east side [there were] three gates, on the north three gates, on the south three gates, and on the west three gates. And the wall of the city had twelve foundation stones, and on them the twelve names of the twelve apostles of the Lamb (Christ). The one who was speaking with me had a gold measuring rod to measure the city, and its gates and its wall. The city is laid out as a square, its length being the same as its width; and he measured the city with his rod—twelve thousand stadia (about 1,400 miles); its length and width and height are equal. He measured its wall also—a hundred forty-four cubits (about 200 feet), according to man’s measurements, which are [also] angelic [measurements]. The wall was built of jasper; and the city was pure gold, transparent like clear crystal. [1 Kin 6:30] The foundation stones of the wall of the city were adorned with every kind of precious stone. The first foundation stone was jasper; the second, sapphire; the third, chalcedony; the fourth, emerald; [Ex 28:17-20; Is 54:11, 12]