Beyond speculations about whether the building was a mausoleum or a villa during the Roman era, the monumental complex of Centcelles (Constantí) is unique for its 4th century mosaics. Exceptional architectural testament of the late-Roman period in Catalonia, since the year 2000, it has been included in the set of monuments of the ancient Tarraco which were declared a Unesco World Heritage Site.

The oldest remains of Centcelles are from a small rural building from the 2nd -1st Century BC, which later became a magnificent villa with a baths complex. The most notable area is the closed circular room with a dome where the mosaics are found. These are considered to be the oldest Christian-themed dome mosaics of the Roman world and are exceptional for their good state of preservation. They represent several scenes, organised into three areas: a hunt on the lower section, biblical scenes from the Old and the New Testament in the central part and figures of the four seasons at the top.

From the study of these mosaics and mural paintings, one could think that the villa was a mausoleum. Even so, its interpretation is still uncertain. The first hypothesis of the researchers suggested that the mosaics made reference to the tomb of Constant, son of the Emperor Constantine the Great. More recent researches, however, think that Centcelles was the late Roman villa of a notable person in the ecclesiastical or civil hierarchy.