Perhaps it was a shrine dedicated to one of the inferior deities, such as often surrounded the greater temples; for, in Mexico, astronomy, astrology, and religion had become mixed up together, as they have been in other quarters of the globe, and even the astronomical signs of days and months had temples of their own.
Xochicalco means "In the House of Flowers." The word "flower,"-- _xochitl_,--is often a part of the names of Mexican places and people, such as the lake of Xochimilco--"In the Flower-plantation." _Tlilxochitl_, literally "black flower," is the Aztec name for vanilla, so that the name of that famous Mexican historian, Ixtlilxochitl, whose name sticks in the throats of readers of Prescott, means "Vanilla-face." Why the place was called "In the House of Flowers" is not clear.

The usual explanation seems not unlikely, that it was because offerings of flowers and first-fruits were made upon its shrines.

The Toltecs, say the Mexican chroniclers, did not sacrifice human victims; and it was not until long after other tribes had taken possession of their deserted temples, that the Aztecs introduced the custom by sacrificing their prisoners of war.

It seems odd, however, that one of the Toltec kings should have been called Topiltzin, which was the title of the chief priest among the Aztecs, whose duty it was to cut open the breasts of the human victims and tear out their hearts.
The Indians always delighted in carrying flowers in their solemn processions, crowning themselves with garlands, and decorating their houses and temples with them; and, while they worshipped their gods according to the simple rites which tradition says their prophet, Quetzalcoatl, ("Feathered Snake,") appointed, before he left them and embarked in his canoe on the Eastern ocean, no name could have been more appropriate for their temple.

This pleasant custom did not disappear after the Conquest; and to this day the churches in the Indian districts are beautiful with their brilliant garlands and nosegays, and are as emphatically "houses of flowers" as were the temples in ages long past.
Since writing the above notice of the Pyramid of Xochicalco, I have come upon a new piece of evidence, which, if it may be depended on, proves more about the history of this remarkable monument than all the rest put together.