To begin with, we must note that the ancient Central-American cultus of the Sun and Moon, considered as the two supreme deities, was by no means renounced by the Aztecs. Ometecutli (i.e. _twice Lord_) and Omecihuatl (_twice Lady_), or in other words supreme Lord and Lady, are the designations under which they are always indicated in the first rank in the religious formulæ. All the Mexicans called themselves "children of the Sun," and greeted him every morning with hymns and with trumpet peals, accompanied with offerings. Four times by day and four times by night, priests who were attached to the various temples addressed their devotions to him. And yet he had no temple specially consecrated to him. The fact was that all temples were really his, much as in our own Christian civilization all the churches are raised in honour of God, though particular designations are severally given to them. The Sun was the _teotl_ (i.e. the god) _par excellence_. I am informed that to this very day the inhabitants of secluded parts of Mexico, as they go to mass, throw a kiss to the sun before entering the church. Notwithstanding all this, we have to observe that, by an inconsistency which again has its analogies in other religions, the cultus of the supreme deity and his consort was pretty much effaced in the popular devotions and practices by that of divinities who were perhaps less august, and in some cases were even derived from the substance of the supreme deity himself, but in any case seemed to stand nearer to humanity than he did. More especially, the national deities of the Aztecs, the guardians of their empire, whose worship they instituted wherever their arms had triumphed, practically took the first place. It is with these national deities that we are now to make acquaintance, and we cannot do better than begin with the two great deities of the city of Mexico, whose colossal statues were enthroned on its principal temple. But first we must form some notion of what a Mexican temple was.