[4] It was restructured in the 15th century by bishop Andrea Novelli,[5] who arrived in Alba in 1484 to find the cathedral in poor condition.

The last major restoration was between 1867 and 1878 by the engineer Edoardo Arborio Mella who modified the exterior of the cathedral as well as the interior décor.

[6] This reconstruction included roofs, aisle vaults, the rebuilding of the apse, the rehabilitation of the facade, opening side windows and the replacement of the pavement.

[2] The current appearance dates to the controversial restoration of the 19th century, of which the three portals and the crypt are from the original edifice.

[4] An ancient baptismal font was found during archaeological excavation in the aisle in front of the Blessed Sacrament chapel.

The finding was not unusual as it was once customary to reuse the space of an ancient baptistery redesigned as a burial place.

It selected a design that takes into account of two of the cathedral's architectural aspects, the ancient chorus and the special decoration of with bands on the columns that stress the development of building upward.

Paintings of Madonna and Child and St Philip date from the same century, and are attributed to Pietro Paolo Operti.

The walls display paintings by Agostino Cottolengo include one of the Abbot San Palemon (1827), and the other depicting Pope Eugene (1840).

[9] The outer paneling consists of inlaid wood scenes, each enclosed in a frame with geometric motifs.

[10] A baptistery chapel designed by the architect Ugo Della Piana in 1991 contains the painting Baptism of Jesus.