In the New World, according to Prescott, King Nezahualcoyotl had zoological gardens at Tezcuco in Mexico in the middle of the 15th century, whilst in the next century Cortes found aviaries and fishponds at Iztapalapan.
The next king of Tezcuco, Nezahualcoyotl, turned the course of war, when Azcapuzalco, the Tepanec stronghold, was taken and the inhabitants sold as slaves by the conquering Acolhuas and Aztecs; the place thus degraded became afterwards the great slave-market of Mexico.
In fact the rest of native history may be fairly called the Aztec period, notwithstanding the magnificence and culture which make Tezcuco celebrated under Nezahualcoyotl and his son Nezahualpilli.
It is related that Nezahualcoyotl, the poet-king of Tezcuco, built a ninestoried temple with a starry roof above, in honour of the invisible deity called Tloquenahuaque, " he who is all in himself," or Ipalnemoani, " he by whom we live," who had no image, and was propitiated, not by bloody sacrifices, but by incense and flowers.
The of tencited poems attributed to Nezahualcoyotl may not be quite genuine, but at any rate poetry had risen above the barbaric level, while the mention of ballads among the people, court odes, and the chants of temple choirs would indicate a vocal cultivation above that of the instrumental music of drums and horns, pipes and whistles, the latter often of pottery.