Ely Cathedral The relief scenes were built into the wall, so each face or statue was individually hacked off, but leaving many finely carved details, and numerous puzzles as to what the original scenes showed. After the reformation it was redeployed as the Parish Church (Holy Trinity) for the town, a situation which continued up to 1938. The central octagonal tower, with its vast internal open space and its pinnacles and lantern above, forms the most distinctive and celebrated feature of the cathedral. However, what Pevsner describes as Ely's 'greatest individual achievement of architectural genius' came about through a disaster at the
Octagonal number Octagonal number An octagonal number is a figurate number that represents an octagon. The octagonal number for "n" is given by the formula 3"n" - 2"n", with "n" > 0. The first few octagonal numbers are: 1, 8, 21, 40, 65, 96, 133, 176, 225, 280, 341, 408, 481, 560, 645, 736, 833, 936 Octagonal numbers can be formed by placing triangular numbers on the four sides of a square. To put it algebraically, the "n"-th octagonal number is The octagonal number for "n" can also be calculated by adding the square of "n" to twice the ("n - 1")th