Hernando Cortés, 2nd Letter. (The attack on the Great Teocalli.)
We fought from morning until noon, when we returned with the utmost sadness to our fortress. On account of this they [the enemy] gained such courage that they came almost up to the doors, and they took possession of the great Mosque[[15]], and about five hundred Indians, who appeared to me to be persons of distinction, ascended the principal and most lofty tower, and took up there a great store of bread and water and other things to eat, and nearly all of them had very long lances with flint heads, broader than ours and no less sharp.
From that position they did much damage to the people in the fort, for it was very close to it. The Spaniards attacked this said tower two or three times and endeavoured to ascend it, but it was very lofty, and the ascent was steep, for it had more than one hundred steps, and as those on the top were well supplied with stones and other arms, and were protected because we were unable to occupy the other terraces, every time the Spaniards began the ascent they were rolled back again and many were wounded. When those of the enemy who held other positions saw this, they were so greatly encouraged they came after us up to the fort without any fear.
Then I (seeing that if they could continue to hold the tower, in addition to the great damage they could do us from it, that it would encourage them to attack us) set out from the fort, although maimed in my left hand by a wound that was given me on the first day, and lashing the shield to my arm, I went to the tower accompanied by some Spaniards and had the base of it surrounded, for this was easily done, although those surrounding it had no easy time, for on all sides they were fighting with the enemy who came in great numbers to the assistance of their comrades. I then began to ascend the stairway of the said tower with some Spaniards supporting me, and although the enemy resisted our ascent very stubbornly, so much so that they flung down three or four Spaniards, with the aid of God and his Glorious Mother (for whose habitation that tower had been chosen and her image placed in it), we ascended the said tower and reaching the summit we fought them so resolutely that they were forced to jump down to some terraces about a pace in width which ran round the tower. Of these the said tower had three or four, thrice a man’s height from one [terrace] to the other.
Some fell down the whole distance [to the ground], and in addition to the hurt they received from the fall, the Spaniards below who surrounded the tower put them to death. Those who remained on the terraces fought thence very stoutly, and it took us more than three hours to kill them all, so that all died and none escaped ... and I set fire to the tower and to the others which there were in the Mosque.
Juan de Torquemada, Monarchia Indiana, Vol. II. Book 8, Ch. XI. p. 144. [Giving a description of the Great Temple.]
This Temple was rebuilt and added to a second time; and was so large and of such great extent, that it was more than a crossbow-shot square.
It was all enclosed in masonry of well squared stone.
There were in the square four gateways which opened to the four principal streets, three of them by which the city was approached along the causeways from the land, [the fourth] on the east in the direction of the lake whence the City was entered by water.
In the middle of this enormous square was the Temple which was like a quadrangular tower (as we have already stated) built of masonry, large and massive.