Its sober and harmonious architecture is the theatre of sa promissa, an evocative ritual of the Antico Sposalizio Selargino (Historic Selargino Wedding): on parchment, the bride and groom handwrite a promise of love, which is kept for 25 years in a glass case. There is no documentary evidence on the foundation of the church of San Giuliano Ospitaliere, protector of travellers. One of the first Sardinian buildings in Romanesque-Victorian style, it certainly arose between the late-11th and early-12th century and was reworked in the 13th. According to tradition this was the first parish church of Selargius. It is located in the heart of the city in Cagliari’s hinterland, a short distance from the current parish church of the Vergine Assunta, built in the 16th century, and the tower of the former Si ‘e Boi distillery that is today a cultural park. Then there is the church of San Lussorio, another Romanesque architectural jewel, on the outskirts.