The Itzamna reference article from the English Wikipedia on 24-Apr-2004
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Itzamna

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In Maya mythology, Itzamna was the founder of the Maya culture, taught his people to grow maize and cacao, as well as writing, calendars and medicine. With Ixchel, he was the father of the Bacabs. He was associated with snakes and mussels. His father was Kinich Ahau or Hunab Ku. The city of Izamal was sacred to him.