José Toribio Medina did his first archeological investigations in Pichilemu, and he published in 1908 "Los Restos Indígenas de Pichilemu". He said there that Pedro de Valdivia gave land in what is now central Chile to Juan Gómez de Almagro on February 24, 1544. Pichilemu was between the areas of the Palloquierbico, Topocalma, and Gulaquien.