The town charter of San Agustín Historical milestone · San Agustín del Guadalix, Cuenca del Medio Jarama, Madrid Image of San Agustín del Guadalix, not of the place itself. Joanna I granted the place, in the early 16th century, the title of town with the right to gallows, pillory, stocks, chain and whip, the insignia that symbolized its own jurisdiction and justice. The territory had been resettled after the area's conquest by Alfonso VI. principios del siglo XVI Photo: AntoineOne (CC BY-SA 3.0) What to see and do in San Agustín del Guadalix