If we could unhesitatingly adopt Munch’s view of the origin of the name Egilsey, it might be safely assumed that this was the church which gave its name to the island, as no other ecclesiastical site is known within its bounds. The Norsemen were heathens down to the time of the Christianising cruise of King Olaf Tryggvason in A.D. 1000, and not very hearty in their Christianity for a long time after that. The church could not have been built, therefore, between 872 and the accession of Earl Thorfinn in 1014. Nor is it likely to have been erected during Thorfinn’s minority, for he was only five years old when his father fell fighting under a heathen banner at Clontarf. The Saga tells that Thorfinn built Christ’s Church in Birsay, and made it the first bishop’s see in the Orkneys. If he, or any of his successors previous to the death of St. Magnus, had erected such a notable structure as that of Egilsey, it would probably have been recorded. There was a church in Egilsey in 1115 when St. Magnus was murdered, and the only question is whether it was the present church. Its resemblances to the Irish churches of the 7th and 8th centuries are not sufficiently definite and determinative to enable us to assign to it unhesitatingly an Irish origin; while, on the other hand, the resemblance to the round-towered churches of Norfolk suggests that it may have been of Scandinavian origin. But there is nothing in the architecture of the building either to fix the date of its erection or to determine the questions of Celtic or Scandinavian origin with any degree of certainty.[185] [Illustration: ORPHIR.] The CHURCH OF ORPHIR is one of the few circular churches in Britain, built in imitation of the church of the Holy Sepulchre at Jerusalem. The crusades were the means of importing this form into the ecclesiastical architecture of the west. A few of these round churches remain in Denmark, and, like those of England, they are mostly of the 12th century.[186] All that remains of this interesting structure is merely the semicircular chancel and about 9 feet of the walls of the circular nave on either side, as shown in the annexed ground-plan. It is described in the Old Statistical Account as having been a rotundo, 18 feet in diameter and 20 feet high, two-thirds of which were taken down to build the present parish church. The curvature of the part of the walls still remaining would give a diameter of 18 to 19 feet. The semicircular chancel is 7 feet wide and a little more than 7 feet deep. The walls are well built of yellow Orphir freestone. The only remaining window is a small one in the east end of the chancel, 30 inches high, having a semicircular head, and the jambs splaying inwards from 10½ inches to 20 inches wide. It has a groove for glass.