The word "temple," if held to imply an enclosed and covered building, is very improperly applied to the kind of edifice in question. Indeed, a Mexican temple (and the same may be said of most of the sanctuaries of Central America) was essentially a gigantic altar, of pyramidal form, built in several stages, contracting as they approached the summit. The number of these retreating stories or terraces might vary. There were never less than three, but there might be as many as five or six, and in Tezcuco some of these quasi-pyramids even numbered nine. The one that towered over all the rest in the city of Mexico was built in five stages. It measured, at its base, about three hundred and seventy-five feet in length and three hundred in width, and was over eighty feet high. At a certain point in each terrace was the stair that sloped across the side of the pyramid to the terrace above; but the successive ascents were so arranged that it was necessary to make the complete circuit of the edifice in order to mount from one stage to another, and consequently the grand processions to which the Mexicans were so much devoted must have encircled the whole edifice from top to bottom, like a huge living serpent, before the van could reach the broad platform at the top, and this must have added not a little to the picturesque effect of these religious ceremonies. Such an erection was called a _teocalli_ or "abode of the gods." The great teocalli of Mexico commanded the four chief roads that parted from its base to unite the capital to all the countries beneath the sceptre of its rulers. It was the palladium of the empire, and, as at Jerusalem, it was the last refuge of the defenders of the national independence.