The marquisate granted by Charles I Historical milestone · Montemayor del Río, Sierra de Béjar, Salamanca Image of Montemayor del Río, not of the place itself. Juan de Silva, third lord of Montemayor, defended the royal interests during the War of the Comunidades in the lands of Toledo and the emperor Carlos I rewarded him in 1538 by granting him the title of Marquis of Montemayor. 1538 Photo: Discasto (CC BY-SA 4.0) What to see and do in Montemayor del Río