The Cathedral of Saint Jacob and Saint Christopher (Greek: Καθεδρικός Ναός Αγίου Χριστοφόρου και Ιακώβου) or the Catholic Metropolitan Church (Greek: Ιερός Καθολικός Μητροπολιτικός Ναός, Italian: Duomo is the seat of the Roman Catholic Archdiocese of Corfu, Zakynthos and Cephalonia.

The Historical Archive of Venice preserves a draft of the 1622 proposal showing the extension of the building because it was too small for the needs of a cathedral.

Around the same period, the provveditore generale Filippo Pasqualigo ordered the Latin Bishop Benedictus Bragadinus (1620-1623) to transfer the bones of Saint Arsenius from the church to the Diocese.

A famous painting of the Virgin and Child was completed by Greek painter Konstantinos Tzanes in 1654, it is preserved in the church.

[3][4] On October 23, 1709, the church was renovated again by the Latin Archbishop Augustinus Zacco (1706-1723), but it was destroyed in 1718 by a fire caused by an explosion of gunpowder.

The Greek Orthodox Church built a small chapel inside the cathedral dedicated to Saint Arsenius.

[4] The final form of the building after the additional extensions is an aisled wooden roofed basilica with three-sided chapels on each side.

They are monastic vaults connected to the main aisle with arched openings) and a polygonal sanctuary particularly created in impressive size.

The front is accompanied by a Gothic tower, while the bell and steeple are relatively small, they feature a pyramidal ending in the back next to the sanctuary.