It is square below, with an octagonal summit of a slightly later period.
The dome is octagonal.
It is octagonal, with figures carved on each side, representing the eight principal winds.
Of the vast range of buildings for the accommodation of the monks hardly any part remains except the abbot's kitchen, noteworthy for its octagonal interior (the exterior plan being square, with the four corners filled in with fireplaces and chimneys), the porter's lodge and the abbey barn.
This is of octagonal form, with very numerous parallel hedges and paths, and "six different entrances, whereof there is but one that leads to the centre, and that is attended with some difficulties and a great many stops."