On January 24, 1544, Spanish conqueror Pedro de Valdivia gave Juan Gómez de Almagro the Topocalma encomienda in which Pichilemu was supposed to be, according to Chilean historiographer José Toribio Medina on his book Los Restos Indígenas de Pichilemu [REF].
The indians that the Spaniards found in that place [Pichilemu] undoubtfully were Promaucaes, and they must have formed part of the Topocalma encomienda, that was given on January 24, 1544 by Pedro de Valdivia to Juan Gómez de Almagro.