San Martín del Tesorillo, colonia agrícola de los Larios Historical milestone · San Martín del Tesorillo, Campo de Gibraltar, Cádiz In 1869 the Larios family bought extensive estates from the House of Medina Sidonia in the area; in 1879 it was officially declared an agricultural colony, the seed of present-day San Martín del Tesorillo, founded by Martín Larios y Larios. 1869-1879 Photo: ZC.Marbella (CC BY-SA 4.0) What to see and do in San Martín del Tesorillo