Among the _teocallis_ of the Aztec capital the “great temple” stood foremost. It was situated in the centre of a vast inclosure, which was surrounded by a heavy wall eight feet high, built of prepared stone. This inclosure was entered by four gateways opening on the four principal streets of the city. The “temple” was a solid structure built of earth and pebbles, and faced from top to bottom with hewn stone laid in mortar. It had five stages, each receding so as to be smaller than that below it. In general outline it was a rectangular pyramid three hundred feet square at the base, with a level summit of considerable extent, on which were two towers, and two altars where “perpetual fires” were maintained. Here the religious ceremonies were conducted. The ascent was by a circular flight of steps on the outside which went four times around the structure. The water in the lagoons being salt, the city was supplied with water by means of an aqueduct which extended to Chapultepec. Such substantially is the account given of the old city of Mexico and its great temple by every writer who saw them before the Conquest, and all the struggles which took place for possession of this capital had a character that would have been impossible any where save in a large city. In every account of the attacks on the great temple, we can see that it was a great temple; and we may perceive what the old city was by reading any account of the desperate and bloody battles in which the Spaniards were driven from it, after standing a ten days’ siege in the great stone building they occupied. THE CONQUEST. This battle took place in the latter part of June, 1520, several months after the friendly reception, and was occasioned by the treacherous and most atrocious proceedings of the Spaniards, which drove the Mexicans to madness. Nearly a year passed before Cortez made another attack on the Mexican capital. During this time he found means among the Tlascalans to build a flotilla of thirteen vessels, which were transported in pieces to Lake Tezcuco and there put together. This would have been impossible if he had not found in the country suitable tools and mechanics. By means of these vessels armed with cannon, and assisted by a great army of native allies consisting of Tlascalans, Cholulans, and many others, he took control of the lagunas, secured possession of the causeways, and attacked the city in vain for forty-five days, although his men several times penetrated to the great square. He now resolved to enter by gradual advances, and destroy every thing as he went. This he did, burning what was combustible, and tearing down most of the edifices built of stone; nevertheless, thirty or forty days more passed before this work of destruction was complete. The inhabitants of the city were given over to extermination.