 In the early Classic period, ballcourts and other artifacts demonstrate a Teotihuacan influence in the Michoacán region.The most useful ethnohistorical source has been the "", written around 1540 by the Franciscan priest Fray Jeronimo de Acalá, containing translated and transcribed narratives from Tarascan noblemen.This "Relación" contains parts of the "official Tarascan history" as carried down through oral tradition