Founding of the monastery of Valdeiglesias Historical milestone · Pelayos de la Presa, Sierra Oeste, Madrid Image of Pelayos de la Presa, not of the place itself. Alfonso VII founded Santa María la Real de Valdeiglesias by bringing together a dozen small hermitages of the Alberche valley. In 1177 the community joined the Cistercians and from then on it lorded over a good part of the comarca until the disentailment. 1150 Photo: Dirección General de Turismo. Consejería de Economía e Innovación Tecnológica. Comunidad de Madrid (CC BY 3.0 es) What to see and do in Pelayos de la Presa