Nineveh was 15 miles long, 8 wide and 40 miles round, with a wall 100 feet high, and thick enough for 3 chariots abreast. Babylon was 50 miles within the walls, which were 87 feet thick and 350 high, with 100 brazen gates. The Temple of Diana, at Ephesus, was 420 feet to the support of the roof. It was 100 years in building. The largest of the pyramids is 461 feet high, and 653 feet on the sides; its base covers 11 acres. The stones are about thirty feet in length, and the layers are 380. It employed 330,000 men in building. The labyrinth, in Egypt, contains 300 chambers and 250 halls. Thebes, in Egypt, presents ruins 27 miles round. Athens was 25 miles round, and contained 350,000 citizens and 400,000 slaves. The Temple of Delphos was so rich in donations that it was plundered of $500,000, and Nero carried away 200 statues. The walls of Rome were 13 miles round.