(a) General view of the original mass of the pyramid at the back with the reconstructed addition in front.
(b) View of stairway and various walls covered up and preserved by the addition.
In 1921 the Mexican Government undertook a restoration of the Citadel, following the discovery of remarkable sculptures on the principal pyramid. It appears that in ancient times this pyramid was enlarged by an addition to one side and the richly ornamented terraces and stairway buried ([Plate XXXIII]). The sculptured stones from the other three sides of the temple were allowed to fall into neglect by the Toltecs or were carried away and put to other uses, but the portion buried was kept in its original state. The colors are still bright in many places and the great heads of plumed serpents and obsidian butterflies sometimes retain their inset eyes of obsidian. The decoration is a repeated motive. The head of the feathered serpent projects outward from the terrace walls and from the balustrade of the stairway, while the body is in low relief. The tail of the serpent has a rattle, and the body is covered with feathers. Shells are seen below the serpent where the body arches and just in front of the tail is a massive head with two rings on the frontal. This doubtless represents the Obsidian Butterfly, a divinity of great importance among the Toltecs, which is represented unmistakably in frescoes at Teotihuacan as well as on pottery. The Citadel well deserves its name, since it is a great enclosure, much like a fort, with buildings upon its bulwarks, and with steep outer walls, which could easily be defended.
A few large sculptures have been found at Teotihuacan. But the site is chiefly remarkable for pottery figurines and heads that are picked up by thousands. The heads present such a marked variety of facial contour and expression that it would seem as if every race under the sun had served as models. It is very likely that these heads formed part of votive offerings, being attached to bodies made of some perishable material. The heads were seldom used to adorn pottery vessels, although many modern and fraudulent vases are so adorned. Dolls with head and torso in one piece and with movable arms and legs made of separate pieces were known. The face of Tlaloc, the Rain God, is fairly common in Teotihuacan pottery but other deities have not surely been identified. It is not improbable that the God of Fire is personified as an old man with wrinkled face, but somewhat less likely that Xipe is represented in the faces that look out through the three holes of a mask. The jaguar, the monkey, the owl, and other animals are also modeled with excellent fidelity. The Mayan convention of the human face in the open jaws of the serpent is not unknown.
Fig. 57. Jointed Doll of Clay from San Juan Teotihuacan.
A number of beautiful vases painted in soft greens, pinks, and yellows have been recovered at Teotihuacan. These colors would not stand the kiln and they were applied after the vessel had been burned. According to one method, the outside of the vessel was covered with a fine coating of plaster upon which the design was painted exactly as in fresco. According to a second method the effect of cloisonné was cleverly achieved. This technique is most characteristic of the region northwest of the Valley of Mexico and will be described later. Incised or engraved designs are commonly met with on pottery vessels at Teotihuacan. No inscriptions have been found at this ruin, in spite of the many years of exploration.
Xochicalco.
Let us now pass over in brief review several ruins which belong to the Toltecan period. Xochicalco, the House of the Flowers, is a large ruin near Cuernavaca. The position seems to have been chosen primarily for defense. The rounded ridge that drops off into deep valleys on either side is laid out in courts, terraces, and pyramids. Only one building offers evidence of the sculptural skill of the ancient habitants. It is a temple, standing upon a rather low platform mound. The sides of the platform mound are decorated with great plumed serpents, seated human figures, hieroglyphs, etc. Parts of the sculptures also remain on the low walls of the temple itself which is now roofless. The stone carving at Xochicalco resembles that of Monte Alban especially as regards the hieroglyphs and is probably of somewhat later date than Teotihuacan. All in all the conclusion seems safe that writing was unknown outside the Mayan area before Quetzalcoatl devised ways and means.