As decorations, we find balconies and galleries supported by square or round pillars, which were often monoliths; but as they were adorned with neither capital nor base the effect must have been rather bare. Battlements and turrets, doubtless first used as means of defense, became later incorporated with decorative art. The bareness of the walls was relieved by cornices and stucco-work of various designs, the favorite figures being coiled snakes, executed in low relief, which probably had a religious meaning. Sometimes they were placed in groups, as upon the temple walls at Mexico, at other times one serpent twined and twisted round every door and window of an apartment until head and tail met. Carved lintels and door-posts were common, and statues frequently adorned the court and approaches. Glossy surfaces seem to have had a special attraction for the Nahuas, and they made floors, walls, and even streets, extremely smooth. The walls and floors were first coated with lime, gypsum, or ochre, and then polished.
No clear accounts are given of the method of erecting houses. Brasseur de Bourbourg thinks that because the natives of Vera Paz were seen by him to use scaffolds like ours, that these were also employed in Mexico in former times, and that stones were raised on inclined beams passing from scaffold to scaffold, which is not very satisfactory reasoning.[664]
However this may be, we are told by Torquemada that the Aztecs used derricks to hoist heavy timbers with.[665] Others, again, say that walls were erected by piling earth on both sides, which served both as scaffolds and as inclined planes up which heavy masses might be drawn or rolled,[666] but although this was undoubtedly the method adopted by the Miztecs, it was too laborious and primitive to have been general,[667] and certainly could not have been employed in building the three-story chapels upon Huitzilopochtli's pyramid. The perfectly straight walls built by the Nahuas would seem to indicate the use of the plummet, and we are told that the line was used in making roads.[668] Trees were felled with copper and flint axes, and drawn upon rollers to their destination,[669] a mode of transport used, no doubt, with other cumbrous material. The implements used to cut stone blocks seem to have been entirely of flint.[670]
BUILDING MATERIAL.
The wood for roofs, turrets, and posts, was either white or yellow cedar, palm, pine, cypress, or oyametl, of which beams and fine boards were made. Nails they had none; the smaller pieces must therefore have been secured by notches, lapping, or pressure.[671] The different kinds of stone used in building were granite, alabaster, jasper, porphyry, certain 'black, shining stones,' and a red, light, porous, yet hard stone, of which rich quarries were discovered near Mexico in Ahuitzotl's reign.[672] After the overflow of the lake, which happened at this time, the king gave orders that this should be used ever after for buildings in the city.[673] Tecali, a transparent stone resembling alabaster, was sometimes used in the temples for window-glass.[674] Adobes, or sun-dried bricks, were chiefly used in the dwellings of the poorer classes, but burnt bricks and tiles are mentioned as being sold in the markets.[675] Roofs were covered with clay, straw, and palm-leaves. Lime was used for mortar, which was so skillfully used, say the old writers, that the joints were scarcely perceptible,[676] but probably this was partly owing to the fact that the walls were almost always either whitewashed, or covered with ochre, gypsum, or other substances.
Frequent wars and the generally unsettled state of the country, made it desirable that the towns should be situated near enough each other to afford mutual protection, which accounts for the great number of towns scattered over the plateau. The same causes made a defensible position the primary object in the choice of a site. Thus we find them situated on rocks accessible only by a difficult and narrow pathway, raised on piles over the water, or surrounded by strong walls, palisades, earth-works and ditches.[677] Although they fully understood the necessity of settling near lakes and rivers to facilitate intercourse, yet the towns on the sea-coast were usually a league or two from the shore, and, as they had no maritime trade, harbors were not sought for.[678]
The towns extended over a comparatively large surface, owing to the houses being low and detached, and each provided with a court and garden. The larger cities seem to have been layed out on a regular plan, especially in the centre, but the streets were narrow, indeed there was no need of wider ones as all transportation was done by carriers, and there were no vehicles. At intervals a market-place with a fountain in the centre, a square filled with temples, or a line of shady trees relieved the monotony of the long rows of low houses.
MEXICO TENOCHTITLAN.
The largest and most celebrated of the Nahua cities was Mexico Tenochtitlan.[679] It seems that about the year 1325 the Aztecs, weary of their unsettled condition and hard pressed by the Culhuas, sought the marshy western shore of the lake of Mexico. Here, on the swamp of Tlalcocomocco, they came upon a stone, upon which it was said a Mexican priest had forty years before sacrificed a certain prince Copil. From this stone had sprung a nopal, upon which, at the time it was seen by the Mexican advance guard, sat an eagle, holding in his beak a serpent. Impelled by a divine power, a priest dived into a pool near the stone, and there had an interview with Tlaloc, god of waters,[680] who gave his permission to the people to settle on the spot.[681] Another legend relates that Huitzilopochtli appeared to a priest in a dream, and told him to search for a nopal growing out of a stone in the lake with an eagle and serpent upon it, and there found a city.[682]
The temple, at first a mere hut, was the first building erected, and by trading fish and fowl for stone, they were soon enabled to form a considerable town about it. Piles were driven into the soft bottom of the lake, and the intermediate spaces filled with stones, branches, and earth, to serve as a foundation for houses.[683]