On the plain near the little town of Carnac, in Brittany, stand eleven thousand immense monoliths in eleven rows, erected probably for religious purposes in the Stone Age. ] These are the beginnings of a real architecture, seen also in the regular wedging with small stones of the spaces left between the wall-stones and covering-stones and between the wall-stones themselves. These small stones were frequently built in, in regular wall-like layers. Sandstone was often used for the purpose, being more easily split into regular pieces, which gave this masonry a still more pleasing appearance. The number of stone blocks used for the wall-sides varies according to the size of the giant’s chambers, as does also the number of covering-stones. For smaller chambers, with six to nine wall-stones, two or three covering-stones were required. But far larger stone chambers occur, as many as seventeen wall-stones having been counted. Such large chambers require a whole row of covering-stones beside one another. The door-opening often shows a special regard for architectonics. The two door-post stones are rather lower than the other wall-stones; on them a stone was laid horizontally, which kept them apart and distributed the pressure of the covering-stone equally on both posts. Very often there was also a stone as a threshold. Leading to the door is a low passage, made in similar manner to the chamber, but of far smaller stones. The passage is only high enough to allow one to creep through, whereas the chamber itself is about as high as a man, so that one could stand upright in most of them. Larger stone chambers are rarely without this passage, and from it such grave-structures have been named “passage-graves.” Besides the building-in of small stones, the holes still remaining between the stones were also coated over on the outside with mud to keep the rain-water from soaking in; mud was also frequently used for making a rough plaster floor for the chamber if the natural floor could not be made level enough. On the floor is frequently found a compact layer of small flints, or a regular pavement of flat stones, often rough-hewn, or roundish stones fitting one another as nearly as possible, which were then probably also covered with a thick layer of mud. [Illustration: “THE MERCHANTS’ TABLE”: AN IMMENSE DOLMEN ERECTED IN THE STONE AGE Archæologists are not entirely agreed as to the purpose of these dolmens. They were more likely graves, or chambers associated with religious rites, than residences. This example is at Locmariaquer, near Carnac, in Brittany. ]