The church of Saint Barnabas is the biggest Romanesque church in Istria with a double apsis, built in the 12th and 13th century, and rebuilt and elevated in the 17th and 18th century. This kind of monument is characteristic for the Orient, especially Byzantium, namely Greece and Cyprus, where Saint Barnabas was a Levite, who introduced Saint Paul to the apostolic choir.
The frescoes in the Saint Barnabas church are among the most important in Istria and in the 14th century the frescoes were far the best on the peninsula and beyond. This unit of wall paintings depicts the Christian cycle that begins with the Birth followed by the Epiphany, the Slaughter of the innocent children and on the wall at the exit Christ, who is crowning the Mother of God, on the left and right side the Seven deadly sins (or Hell). At the northern wall there are scenes of Christ preaching in the temple, the Last supper, the Crucifixion and Resurrection.
The frescoes have recently been restored, and at that occasion they found about thirty graffiti written in Glagolitic and Latin writing. The Glagolitic graffiti of this church colouring book uncover names and details of former inhabitants, primarily Glagolitic priests and their pupils. The preserved stone fragment of the inscription tells us that the Glagolitic text was written in Vižinada in the 17th century.