Known as Santa Maria di Bangio, the church of Guasila is dedicated to Our Lady of Itria, located in the village countryside. Its name derives from the medieval villa Banxo de Liri, of which it was the parish church. The village was part of the curatorate of Trexenta and has been documented since 1219. Legend has it that the village was destroyed by the 'musca maccedda' and the survivors, welcomed in the nearby settlement of Guasila, dedicated the church to Santa Maria in gratitude for having saved them. However, the Romanesque church, built on an older site revealing settlements in Nuragic and Roman times, changed its name when the cult of Our Lady of Itria spread across Sardinia after the fall of Constantinople in 1453. There is no information on the Romanesque construction of the church. The south-west façade, which is supported by a portico that protects the entrance and most probably dates back to the 17th century and served as a shelter for pilgrims, as was typical in rural churches of that period, is made of regular grey sandstone cantonetti and is the only original element, dating back to the second half of the 13th century and slightly altered over time. The other structural elements, including the bell gable, have been reconstructed over the centuries, partly using the original material. The upper corners of the front elevation are adorned with capitals decorated with pointed leaves, which together with other friezes, contribute to the embellishment of the surface. The interior of the church is poorly lit and has a small apse that is currently filled in. The altar, dating from the second half of the 18th century, houses a valuable altarpiece depicting the Virgin and Child.