A marble transenna with columns divides the central nave from the main altar. It catches the viewer’s attention thanks to the beautiful gothic organ of the 19th century.
The space at its base is dedicated to the choir and used to host singers during the religious function. This space is also bounded by a parapet, decorated with the crest of the former Cathedral and some gilded bas-reliefs depicting the twelve apostles.
At the top of the organ a little angel dominates the church from the above, while at its back a beautiful apse stands.
The masonry altar is made of fake marble; the stone is painted and covered with sheets of glass to simulate the typical gloss of the marble surface.
At the sides of the altar, leaning against the walls, wooden stalls are placed as seats for officiants and clergy. Above, four paintings show scenes related to the history of the church of Lentini. Starting from the right, counterclockwise:

• Bishop St. Rodippo attending the martyrdom of his sister Epifana, whose breasts were cut off;
• Bishop St. Luciano showing the relics of the martyrs to the people;
• Bishop Costantino participating at the Council of Nicaea in 787 AD., at the presence of Pope Adrian I;
• St. Onesimo, teacher and educator of the three young Alfio, Filadelfo and Cirino.