 Later, in 1855 friar Pedro Beaumont, in the Michoacán Chronicle, displays the first map of the Pátzcuaro Lake basin, with indication of the most important Tarascan establishments.Beaumont refers to Ihuatzio as one of the main tarascan establishments of the Pátzcuaro Lake basin.In 1929, Marquina for the first time made a survey of the site surface, describing and making sketches of the rectangular base structures.