Several days ago while driving across town in the car, it came in conversation that the New Jerusalem was perfect cube.
Also, according to my source, the measure of city's dimension was quite significant of itself.
Since beltway traffic was heavy and I was in the midst of exiting to an even more congested side road, I let most of those assertions ride. But I made a mental note to look up and read the specifics of Revelations chapter 21. From previous readings and commentaries, I was already a sceptic about whether John of the Gospel was the same author of the epistles and this final book. If I looked at words and concepts in the Gospel and Revelations, I am inclined to think that John Patmos was a wholly new influence on the course of the overall Biblical book: someone accused of a less polished Greek, pre-occupied with swords, harlots, the number seven and the the number 12, wings and mouths, codes and symbols for sure.
21:1 - "Then I saw a new heaven and a new earth..."
21: 9- "One of the 7 angels that had the 7 bowls full of the seven final plagues came to speak to me and said, 'Come here and I will show you the bride that Lamb has married... [and] in the spirit he carried me to the top of a very high mountain and showed me Jerusalem, coming down out of heaven from God. ...Its wall was of great heigh and had 12 gates... and over the gates were written the names of the 12 tribes of Israel... and on each of the twelve foundation stones, each one of which bore the name of the 12 apostles of the Lamb.;
21:15 ... "The plan of the the city is perfectly square, its length the same as its breath. He measured the city with his rod and it was 12,000 furlongs [ elsewhere stadii] equal in length and breath, and equal in height."
I think we stop for now right there, lest we start studying the diamond, gold and other jeweled furnishings. Looking at my Greek NT, it appears that the original was measured as 12,000 stadii per side. One conversion I found is 1 stadia = 607 feet.
One modern measure of the nautical mile for astronautical measures is 6076.115484 ft or about ten stadii. It's a little obscure, but consider some other relationships with nautical miles. If the circumference of a spherical ( vs. oblate) based on a radius of 3443.934 nautical miles is 21,638,875... nautical miles, nothing immediately leaps out at you. Why should we have nautical miles at all? But what if we divide that number by 360 to get the number of nautical miles per degree of circular arc? We get 60.1 nautical miles/ degree or pretty close to 60. With stadii we get about 600.
That there is any connection between circumference and the stadia, I do not attribute this to John of Patmos, but rather to Eratosthenes. Eratosthenes. In the third century BC working in Ptolemaic Egypt, he derived a fairly accurate terrestrial circumference by measuring differences in elevation of the sun in Alexandrian and up-river wells, doing additional work in astronomy and geography.
I don't think John of Patmos saw stadii in this context since he describes the descent of a cubical 1200-nmi wide city onto the plains east of the mediterranean sea. Lunar radius for example is 940 nautical miles. As observed from space the New Jerusalem would be nearly as large as the moon with a point of tangency on the revolving earth somewhere around 30 degrees north. This vision would make more sense with a Flat Earth on which a perfect cube could reside like Florida's Vertical Assembly Buildind, built to about 1/12000th scale.
This is described both as the paradise ( garden earth) and the new earth in various discussions we are aware of. Moreover, there is also a connection between the new Jerusalem and an elect of 144,000. In John's account it would appear to be an exclusive of the tribes of Israel - or at least they would have most of the reservations.
Another problem for 144,000 elect is seating or housing.
When you consider this number for a moment with respect to squares or cubes, you discover that the formations needed to attend to housing or seating are non-trivial.
The square root of 144,000 is 379.473 - so I would recommend even - odd seating and a tweak or two. But when you consider that the square of 1200 nmi per side, you get 1,440,000 square miles. That's an elect population density of 0.1 per square mile and 1200 nautical miles of ceiling space.
The cube root of 144,000 is 52.4. So that would mean a need for 52.4 housing units per side.
No, I'm not an expert on these matters, but they do make me lean away from literal interpretations of apocalyptic writings.