Page:Van Loon--The Story of Mankind.djvu/505

Rh divinity. As no sermons were preached before the images of Osiris or Zeus or Jupiter, it was not necessary that the interior offer space for a great multitude. All the religious processions of the old Mediterranean peoples took place in the open. But in the north, where the weather was usually bad, most functions were held under the roof of the church.

During many centuries the architects struggled with this problem of constructing a building that was large enough. The Roman tradition taught them how to build heavy stone walls with very small windows lest the walls lose their strength. On the top of this they then placed a heavy stone roof. But in the twelfth century, after the beginning of the Crusades, when the architects had seen the pointed arches of the Mohammedan builders, the western builders discovered a new style which gave them their first chance to make the sort of building which those days of an intense religious life demanded. And then they developed this strange style upon which the Italians bestowed the contemptuous name of "Gothic" or barbaric. They achieved their purpose by inventing a vaulted roof which was supported by "ribs." But such a roof, if it became too heavy, was apt to break the walls, just as a man of three hundred pounds sitting down upon a child's chair