The church of Sant Feliu is a basilica that dates back to the early days of Christianity. It houses the services of the parish church of Sant Feliu of the Bishopric of Girona, so called because it was the main church of Girona before the construction of the cathedral. Its construction, in honour of the martyr Saint Felix, lasted from the 12th to the 17th century and conserves a large part of the Romanesque building, later completed with the Gothic naves and roofs and the Baroque façade. The main attraction is made up of eight extraordinary Roman and early Christian sarcophagi from the 3rd and 4th centuries, found when the church was built, together with the Gothic sepulchre of Saint Narcissus.

The building originates next to a Roman road where the martyrium, or early Christian church, built in honour of the martyr St Felix, is believed to have stood. It is deduced that it had great prestige, as King Recaredo gave the church a votive wreath.

During the Muslim occupation of Girona (717) it seems that the old church had cathedral functions, as the cathedral had been converted into a mosque.8 After the Frankish conquest, towards the end of the 8th century, it housed a community of presbyters dependent on the cathedral, to which it would remain strongly linked from then on.

As it was located outside the walls, it was fortified several times and different architectural styles can be observed. The ground plan and the elevation of the chevet (12th-13th centuries) remain from the old Romanesque church, while the rest of the structure is Gothic, built from the 14th century onwards and reaching its maximum splendour in the 16th century. In 1835, however, it became a simple parish church.

On 31 May 2011, Pope Benedict XVI granted it the title of minor basilica at the request of the bishop of Girona, Francisco Pardo, making it the second to hold this title in the region, after the church of Santa Maria d'Ampurias.

Eminently Gothic in style, the building is based on a Romanesque layout. It is basilica-shaped and has three naves separated by four semicircular arches on each side of the central nave, above which runs a triforium. The central nave ends in a large Romanesque semicircular apse pierced by tall Gothic windows that let light into the interior. As for the side naves, the one on the south side contains two apses, which are not on the north side, as they disappeared when the chapel of San Narciso was built in the 18th century. The present Gothic bell tower replaced the old Romanesque one and was built between the 14th and 16th centuries, to the left of the main Baroque doorway on the south façade. The other two Gothic entrances to the collegiate church are also on the south and north sides.

Most of the capitals in the apse, decorated with plant or animal motifs, are from the Romanesque cloister, some of which depict scenes from the life of Saints Felix and Narcissus, to whom the church was dedicated in the 11th century. A Gothic cloister was built in the 14th century (1357), which has not survived to the present day.

During the most recent restoration work, carried out at the end of the 20th century, the Gothic polychromy of the vaults and the ribs of the central nave, which had been covered with lime during the Baroque period, was revealed.

Valuable furnishings have been preserved, in addition to those kept in the Girona Museum of Art.