There are remains of ancient chapels, Danish duns and Druidical circles on the island.
A rescript of Augustus forbade Roman citizens to practise druidical rites.
Near Bennachie (1619 ft.) are stone circles and monoliths supposed to be of Druidical origin.
Diarmait, son of Fergus Cerbaill (544-565), of the southern Hy Neill, undoubtedly professed Christianity though he still clung to many pagan practices, such as polygamy and the use of druidical incantations in battle.
As in the case of Stonehenge, the purpose for which the Avebury monument was erected has been the source of much difference of opinion among antiquaries, Dr Stukely (Stonehenge a Temple restored to the British Druids, 1740) regarding it as a Druidical temple, while Fergusson (Rude Stone Monuments, 1872) believed that it, as well as Silbury Hill, marks the site of the graves of those who fell in the last Arthurian battle at Badon Hill (A.D.
St Patrick doubtless introduced the ordinary coronal tonsure, but in the period following his death the old druidical tonsure was again revived.