There are ruins of colonnades, courts, buildings and other structures of which many columns are standing at Chichen Itza, and it has been called “the city of a thousand columns” by some writers. One of the most important monuments is the Nun’s Palace, as it is called. It is not so large as others, but contains a greater number of apartments. It is said to have been the custom of these people to educate girls of noble birth to the service of the gods, on their attaining the age of twelve or thirteen. Their service was similar to that of the Vestal Virgins, although the vows were not always perpetual. It was their duty to keep the altar supplied with fresh flowers and to sweep the temples. One group of structures is called the Ball Court, as it is believed to have been used for a game similar to the modern basket ball. It consists of two perpendicular parallel walls from north to south thirty-two feet high, three hundred and twenty-five feet long and one hundred and thirteen feet apart. The ends of this quadrangle are each occupied by a small temple. In the centre of each wall, about fifteen feet from the ground, there are two stone discs with holes through the centre, which seem to have had a part in this or some other game. The vast proportions of this court, or tlachtle, would seem to indicate that this game was very popular with the Yucatecos. Some of the well preserved ruins present beautiful sculptured façades, to which names have been given because of the fancied resemblance to something. For instance, one has been called the ruins of the “House of the Tigers,” because of a frieze of stalking tigers divided by richly fringed shells; another round building, known as El Caracol, “The Snail,” is the best preserved building at Chichen; “The Red House,” and the “House of the Dark Writing,” are still other structures. In all directions for several miles the bush is strewn with ruins. Crumbling walls and courts overgrown with jungle growth are encountered on every side, but because of the disintegration these once splendid palaces and temples are now little more than shapeless masses of crumbled masonry. The human figures seen on these monuments have the usual types of the Toltec carvings on the plateaus of Mexico. The total area covered by these ruins has been estimated by some investigators as high as ten square miles.