Many of the earlier Norwegian and Swedish cathedrals were built by English or French workmen. There were six basilicas in Norway, with towers at the end of the choir aisles. In Denmark there are eight round churches and one octagonal. Roeskilde, Ribe, and Thorsager are apsidal; but the general characteristics of the Danish churches are a square east end, and an immense south porch and parvise. The wooden churches of Norway are probably of Byzantine origin, the plans having been brought back by the Varangians.