This church, which dates back to the second half of thirteenth century, was constructed in the Cistercian-Gothic style. It has a sober façade, but inside it has a single nave decorated with two of the oldest and best preserved cycles of frescoes of the medieval period in Abruzzo.
The oldest frescoes date back to the end of the thirteenth century and are of the Benedictine school. On the right hand wall there are the Old Testament stories with Christ creating the Sun and the Moon, the animals, and man and woman, the stories of the original sin and the loss of Paradise. In the presbytery the frescoes depict Christ and the Saints, the Last Supper, the Judas’ kiss, the Flagellation, the Crucifixion and the Burial.
The Last Judgement occupies the rear wall with Christ, the Apostles, the Elect and the Resurrection of the Dead. At the bottom, Hell is depicted with the damned and Saint Michele weighing souls with his scale.
The frescoes of Bominaco is a reference to the illustration of the months. In successive epochs the left hand wall was decorated with maryological frescoes. Here you find the Annunciation, the Madonna and child, other saints including Saint Caterina of Alessandria and Saint Rocco.