Before these were built we have at Cologne, S. Gereon's Kirche, with circular arches, date 1227, and S. Pantaleon, 980, but there is not a sign of Gothic in either. Bonn cathedral, built in 1151-1270, is also round-arched. Coblenz is Carlovingian. Mayence, round-arched of the tenth and eleventh centuries (the Gothic side-chapels date from 1260 to 1500). Treves, with round arches, early Romanesque of the eleventh century; choir, later Romanesque of the twelfth century; some parts which are pointed were of the thirteenth century. Hildesheim, a Romanesque Basilica, built in the eleventh century. Dom Insel at Breslau, 1170, is tripartite, on the Comacine plan, and very quaint. Worms, 996-1016, Lombard style, with round arches; the parts with pointed architecture are much more modern. This list proves that the earliest churches were built by Italian Masters, or at least in the Italian style. Indeed Hope classes most of them as Lombard. The Germans themselves expanded the Lombard style into the pointed, which also came up through Italy, its first signs being seen at Assisi, next at Pisa, and then Florence. Milan was a later reflex of the perfected German Gothic, though chiefly executed, as we shall see later, by the hands of Comacine Masters. As I have before remarked, climatic influences greatly determine the style of a national architecture. To the sunny south belong the flat roof; the shady colonnade; the horizontal line and frieze; the fountained court; the smaller windows; and the solid tower. To the north the pointed roof, that snow and rain shall not decay it; the solid buttress to resist the greater outward pressure of the high and aspiring sloped roof; the perpendicular tendency in design; the larger windows for a less sunny atmosphere; and the pointed spire to carry up the general lines.