San Giovanni Evangelista, Parma

The interior is on the Latin cross plan, with a nave and two aisles covered with cross vaults, and a dome at the crossing. The structure is similar to the nearby cathedral's. The grooved piers are Renaissance elements of classical inspiration.

Detail of Correggio's frieze

The design included since the beginning a thoroughly painted decoration of the interior, and a contract had been signed with the young Correggio, who a had already worked in another Benedictine monastery, in the Camera della Badessa of San Paolo. Correggio added a painted frieze which runs for the whole internal perimeter.[3] It is long strip with monochrome paintings (with few red details) on a dark blue background, including also some tondoes with portraits of Benedictine popes, cardinals and monks. The main feature is a series of puttos in actions symbolizing the importance of the Christian Mass and sacrifice. The grotesque decorations on the semi-piers and the vault decoration (with candelabra, puttos and symbols of St. John the Evangelist) were also from Correggio's pupils, in particular Michelangelo Anselmi (c. 1520).

The ceiling of the left crossing was painted by Anselmi with a St. Benedict Enthroned and Four Saints (1521), while the walls show terracotta sculptures by Antonio Begarelli (St. John the Evangelist and Madonna with Child and St. John, c. 1543). In the arch of the right chapel of the presbytery are additional frescoes by Bedoli.

The right apse has ceiling frescoes of Stories of the Life of St. John of Parma by Anselmi. The altarpiece with the Miracle of Sy. John was painted by Emilio Taruffi (1674). At the walls are two groups by Begarelli, portraying St. Felicita with Saint Vitalis and St. Benedict. The presbytery has grotesque decorations attributed to Correggio, while the puttos were added around 1588 by Innocenzo Martini; a fresco from 1587 replicates the original by Correggio, of which only the central part remains, now at the Galleria Nazionale di Parma.

The carved wooden choir by Marcantonio Zucchi, inlaid with floral motifs, views of towns and hills and musical instruments, runs around the apse. The sacristy was frescoed in 1508 by Cesare Cesariano.

Lunette of St. John and the Eagle by Correggio

Correggio executed five frescoes groups. The first includes the portal leading to the sacristy with a fresco in the lunette, depicting St. John and the Eagle (c. 1520) and generally considered his first work in the church, although similarities with the dome decoration could imply that it dates from a later period. The inscription ALTIUS CAETERIS DEI PATEFECIT ARCAN around the painting refers to the nocturnal prayers of the monks.

This is followed by the dome, with a fresco traditionally referred to as the Vision of St. John at Patmos,[1] and the drum and the four pendentives decoration. The third work was the decoration of the vault and the apse ceiling of the Cappella Maggiore, partially destroyed in 1586 when the choir was prolonged: today the central fragment with the Coronation of the Virgin (now at the Galleria nazionale di Parma) has survived. The fourth intervention was in the choir's walls, which were totally destroyed during its reconstruction. Preparatory drawings show that also the parts executed by his pupils were designed by Correggio, such as the candelabra in the presbytery's vault and the puttos on the cross-vaults.[3] Behind the 17th century altar in polychrome marble is a large canvas of the Transfiguration by Girolamo Mazzola Bedoli (c. 1556).[1]

St. Nicholas by Michelangelo Anselmi

The left nave has a baptismal font whose base is a c. 1st century AD Roman funerary monument.