Elements of Christianity, the suggestion of pilgrims, hypotheses, doubts and new discoveries on the Domus complex of marine mosaics , the structure that emerged in the archaeological area of Turris Libisonis , the Roman city of Porto Torres . The details were illustrated on the occasion of the historical and cultural conference " The prodromes of Christianity in the city of Turris Libisonis ", organized by the Curia on the occasion of the anniversary of the Dedication of the Basilica of San Gavino. An initiative which was attended by the archbishop, Gianfranco Saba, Gabriella Gasparetti and Gianluigi Marras, respectively responsible and official archaeologist of the ABAP Superintendence for the Provinces of Sassari and Nuoro. The project was illustrated by the archaeologist Gasperetti, responsible for the procedure, planning and scientific direction of the archaeological excavation, financed by the regional secretariat of the Ministry of Culture with funds amounting to 577,200 euros, and the beneficiary of an additional loan of 1 million euros.

A three-level building with ten rooms with particularly beautiful mosaic coverings: a rectangular floor, an apsidal room, a small apsidal room, a corridor, a room with a large basin, two small side rooms, to which are added the latest discoveries of the changing room, the large rectangular room and the larger apse room on the ground floor. The elements reveal that the building had at least two periods of use, one in the 3rd century AD and a final one in the 4th - 5th century AD If in the 2003-2004 excavations the complex looked like a luxurious patrician house of the ancient Po Valley city, with rooms on several levels, with panoramic views of the Rio Mannu, a complex of considerable wealth. The excavation of 2022 revealed new details on the domus which allow us to advance the hypothesis that it is a thermal apparatus that extends for an entire block. The presence of a heated area and cold environments suggest a thermal environment which later became a place of Christian worship.

The hypothesis is confirmed by a scene depicting two individuals, probably attributable to the rite of the "fractio panis", the gesture of the breaking of the bread made by Christ at the Last Supper, and then the early Christian inscription in capital letters which reads "Deo gratias qui praestitit”, (thanks to God who has provided), dated in the second half of the 4th century AD Furthermore, in the upper part of the complex there is a use for burials, of adults and infants. While in the extreme part of the compartment there would be a burial of rank, an area in which to carefully place an individual without grave goods in which investigations are underway for the examination of the DNA, a body placed to the side which according to some scholars was a position that could concern pilgrims, or foreign individuals. «To favor the entry of other peoples, the port and the Rio Mannu, an area facing one of the entrances of the ancient city that could welcome pilgrims, foreigners and, the same Christian inscription found inside the walls, could mean something of welcoming a cult from other communities» explains the archaeologist. A port that brought people, goods, cultures, religions and spiritualities.

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