The Alcázar of Segovia, like many fortifications in Spain , started off as an Arab fort, which itself was built on a Roman fort but little of that structure remains. The first reference to this particular Alcázar was in 1120, around 32 years after the city of Segovia returned to Christian hands (during the time when Alfonso VI of León and Castile reconquered lands to the south of the Duero river down to Toledo and beyond). However, archaeological evidence suggests that the site of this Alcázar was once used in Roman times as a fortification.