Tendilla was common in the town and land of Guadalajara until the late fourteenth century. Don Enrique III of Castile segregated and rose to the rank of town in 1394, to donate it in dominion, the following year , in Almirante Mayor Don Diego Hurtado de Mendoza.
On the death of the admiral, in 1404 , his son inherited the villa Don Inigo Lopez de Mendoza , Marquis of Santillana , who send build its magnificent castle . Don Inigo extended its dominions to neighboring villas Aranzueque , Armuña of Tajuña and Fuentelviejo in August 1430, thanks to donations paths of King John II of Castile for their support in the war against the princes of Aragon .
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