The assault of Juan de Oviedo Historical milestone · Arroyomolinos, Comarca Sur, Madrid Image of Arroyomolinos, not of the place itself. Juan de Oviedo seized the place around 1476 and had a tower raised to dominate it. Gonzalo Chacón, steward of Isabella the Catholic, laid siege to it that same year and ended up stamping his coat of arms on the fabric. 1476 Photo: Zarateman (CC0) What to see and do in Arroyomolinos