These square churches are extraordinarily interesting to the student of architecture from the fact that they display Byzantine forms exercising an influence on the development of Gothic in the far north of Europe. Unfortunately the new idea does not seem to have spread beyond the island, but it is full of suggestion for small town churches at the present day, especially where the site is awkward and cramped. [86] The lower one just pointed, the upper round. [87] There are a few British instances of Romanesque churches, square without and apsidal within. Such are the Oratory of St. Margaret in the Castle at Edinburgh, two chapels in Romsey Abbey, and one in the ruined Abbey at Shaftesbury. A Renaissance instance of the same thing exists in the Chapel of Clare College, Cambridge. [88] It is a fine late Romanesque building, quite moderate in scale. For five bays extend nave and aisles, and the square chancel is flanked by small towers which become octagonal above the roof. (These are a characteristic German feature, and recall Trier or Mainz, but this Visby church has no resemblance to any existing building in Lübeck.) Pillars of some variety with figure-and leaf-carved caps sustain the triple vault, nor is the centre carried higher than the aisles. The great south door, six times recessed with shafts both round and square, is a magnificent example of what in England is called Norman work. There are many such fine doorways in the town, but no other is as good as this. Rather later than the rest a great west tower was built, and on the northern side it has a gallery open by a rich arcade.