Dating back to the 13th century, the church of Santa Maria di Sibiola in Serdiana fits into the context of the medieval 'villa' of the same name, with documentation attesting to its existence as early as 1215. The architectural influence of the church of San Saturnino di Cagliari (1089-1119) is evident in its structural features. The building, which has come down to us in a good state of preservation, has a double-nave plan with internal sandstone walls. The square façade is bordered by angular pilasters and characterised by nine rounded hanging arches resting on decorated wall elements known as corbels. This arch decoration continues along the sides of the church, giving the building a harmonious and coherent appearance. A particularly interesting element is the remains of a small external staircase, once used to access the bell gable, of which only the base ashlars remain visible today.