The sober facade has three doors, each flanked by Doric pilasters. The roof is richly carved with cassetoni by Alessandro Della Nave and Antonio Villa. The main altar (1867) is decorated with
scagliola. In the rear of the choir is a 16th-century, polychrome terracotta statuary group depicting a
Crucifixion Scene by
Alfonso Lombardi. Atop an
entablature is an oval depiction of St Petronio, by
Felice Giani. Flanking the main altar are an organ and another depiction of
St Petronius, patron of Bologna and Castel Bolognese, by
Angelo Gottarelli. A wooden statue of
San Petronio in the nave is a copy of the 12th-century statue in the
Duomo of Bologna, donated to
Pope Pius IX by Bologna. The first altar on the right is dedicated to
St Andrea Avellino and has a statue of St
Therese of Lisieux. The first chapel houses a
Visitation flanked by canvases with
St Jerome and
Lawrence, all by
Alfonso Cittadella. The second chapel houses an altarpiece depicting
Saints Dominic and Emidius and a Holy Martyr, attributed to
Benedetto dal Buono while in a window we find a 15th-century
Madonna del Rosario attributed to
Giovanni da Riolo. The third chapel has a statue of
St Jerome by
Alfonso Lombardi and another of
St John the Baptist by
Ottavio Toselli. In the last chapel is a depiction of
St Michael Archangel attributed to
Francesco Longhi. The church has a replica of the
Grotto of Lourdes, created in 1933 with gypsum rock extracted from
Casola Valsenio. ==References==