Roman remains under Alfonso X
Commonly known in the city as “the chambers of Hacienda”, these Roman remains were discovered in 1628 during construction of the present building by the Society of Jesus, as documented by Julio Porres. In 1918 they were “rediscovered” when the architect for the tax office, Álvaro González Sanz, prepared drawings of the remains´ floorplan and sectionals, which at the time were used as junk rooms.
The restoration took place in two stages, uncovering the complete structure consisting of three parallel arched galleries, the middle one being narrower that the other two. Through their southerner side the galleries open to a new chamber, also arched and larger than the rest.
It has been confirmed that the central gallery continues into the documented gallery below the hypocaust of the thermal baths at Plaza de Amador de los Ríos. This establishes the presence of a water supply to a thermal complex of large size, chronologically established at around I century AD.