Abernethy

The Abernethy Tower in Perthshire
dates probably from the 9th or 10th century, with 11th century
alterations. It is 72 feet high and only 8 feet in interior
diameter, with walls 3 1/2 feet thick. There were six stages
of timber flooring, and door and windows are in the Irish
style. The modern clock is somewhat incongruous. These towers
served the Celtic clergy as steeples, watch-towers against
Viking invaders and others, and refuges. There are still 76
of them standing in Ireland.