Carranque contains the site of a Roman villa that is protected as an archeological park by the Castile-La Mancha government.

In 1983 a local peasant, Samuel López Iglesias, found a series of mosaic floors while plowing in the fields known as las Suertes de Abajo.

The buildings date from the late fourth century and are thought to belong to a "Villa of Maternus Cinigius", the uncle of Theodosius I, Roman emperor, born in Hispania, but presently the owner is still unknown.

The head of the Roman building, as the hermitage of Santa María de Abajo ("Saint Mary of the lower side"), lasted until around 1920 when it was dynamited to serve as construction material for the modern town.

There were plates of marble, red porphyry, and green serpentinite, wall painting, opus sectile and mosaics with glass and golden-leaf tiles.

The hypocaust under-floor heating and running water hint of the richness of the owner that becomes luxury when admiring the mosaics, assembled by at least three workshops, two of which took the unusual pride of signing their work.

The mosaics depict: The oecus, where the owner held meetings and banquets showing off his social status, was ended by a raised exedra.

A sloped floor formed a semicircular wall fountain with a mosaic of the god Oceanus, featuring crab antennas and claws and a wavy beard.