In the western part of the archaeological excavations in progress on the "Domus dei mosaici Marini", an early Christian inscription in capital letters has appeared which reads "Deo gratias qui praestitit", dated in the second half of the 4th century AD which reveals the presence of a Christian place of worship .
A new and striking discovery in one of the new environments investigated in the residential complex, in the archaeological area of Turris Libisonis, the ancient city of Porto Torres. The inscription emerged at the transition point between the lower level of the unheated floor and the upper level of the heated apsidal room, inside one of the large rooms of the "Domus" which, following the expansion of the excavations, appears consisting of at least three levels.
It is a very rare formula in Latin, dated in the second half of the 4th century AD, with examples also in Africa and in Rome, which reveals the first presence of Christians in Porto Torres, in the western area of the ancient city. The structure is located near the Rio Manno and the Roman bridge, therefore in a different area from Monte Agellu, the Christian cemetery area where the martyrs from Turrita, Gavino, Proto and Gianuario are said to have been buried.
A new place of Christian worship dating back to a period before the construction of the first basilica, built under the current Romanesque church of San Gavino, therefore after the martyrdom of the three Turritan saints. The investigations around the complex were expanded, concentrated on the connection area between the two areas of the "Domus" that had already emerged in the previous excavation campaign and on the drainage pipes of the thermal sector of the plant. New rooms with mosaic coverings featuring geometric motifs and designs representing the marine fauna of the Gulf of Asinara.
