Acquaviva delle Fonti Cathedral

The main facade has a cusp, tripartide by pilasters and divided in two orders (the first one is corinthian, the second doric), all is in a Renaissance style, while the rest of the facades have an architectural style that recalls the Apulian Romanesque.

A Reinassace rose window opens in the center of the frontal prospect, that tends to manierism, formed by sixteen columns placed like rays and connected by little arches. Under these there is an alternation of valves made with shells and heads of winged puttini. From the center of the rose window protrude a phytomorphic lithic figure.

The main portal has a protiro finely decorated. The columns that support their pediment rest on two stylophores lions.

The lateral portals are dominated by two niches that are nowadays empty. Each of them have installed on the top a bas-relief that shows an antic version of Acquaviva delle Fonti coat of arms.

The archivolt of this portal has a bas-relief that represents Saint Eustace's conversion.[5]

The facade ends on the top with a broad triangular fifth, in which center there is a plaque commemorating the name of the feudal lord of Alberto Acquaviva. On the three vertices there are sculptures made of stone, that represent Saint Peter and Saint Paul on the sides and Virgin Mary sit with his Child on the knees on the central one.

The interior, with a latin cross floor, is divided in three naves with vaulted roof. The main vault is supported by large arches, which rest on stone pillars with columns half overhang in the direction of the aforementioned arches. The perimeters walls have half extended columns, surmounted by fake little pillars supporting the arches. The vaults, as well as the pillars and columns, are decorated with stuccoes. The high altar, dating back to the 16th century, is dedicated to the Virgin of Constantinople. The oil paintings, which adorned the primitive church, were donated to the churches of Saint Dominick, Saint Mary the Greatest, Sant'Agostino and Santa Maria della Libera during the reconstruction works. The monumental organ was donated to the church by Bishop Tommaso Cirielli.[6]

The crypt, probably built at the same time of the primitive church, has a parallelogram shape and is covered by twenty-four cross vault, supported by fourteen marble columns of ionic order in the center and by little pillars protruding from the perimeter walls. Leaning against the rear wall there are three valuable altars. On the first of them is placed a picture of Saint Eustace, on the sides of which two marble sculptures rest on shelves, representing respectively the wife of the saint, Theopista, and the group of sons Teopisto and Agapio.

The central altar, built in 1693 and dedicated to the Blessed Sacrament, it is surrounded by French breach balustrades. The frontal, all in double silver sheet, has an octagonal temple surmounted by a small dome and divided into three floors decorated with various figures. A large tabernacle stands out on the altar.

The third altar, built in 1753 and dedicated to the Virgin of Constantinople, is entirely covered with silver sheets. Over it dominates a painting attributed to Francesco Palvisino depicting the aforementioned Madonna that holds the Child in her arms. The images of the Madonna and the Child are adorned with two golden crowns.

The Vegezzi Bossi organ of the Co-cathedral of Acquaviva delle Fonti

On the choir in the counter façade there is the pipe organ, built in 1905 by Carlo Vegezzi Bossi; the instrument, over time, has undergone major restorations and renovations, including that of 1968, conducted by Leonardo Consoli, and that of 2001-2004 conducted by the organ building firm Continiello, during which, among other things,the wooden box, the work of the acquavivese Paolo Tritto, was removed and was supplied the new mobile console.

The instrument, with electric transmission, has three keyboards of 58 notes each and a concave-radial pedal of 30. Below, its phonic arrangement:[7]