The layout of the cathedral follows that of the
Latin cross. The vaulting of the choir and the south aisle is ogival (gothic). The vaulting for the north aisle is groin vaulting and the ceiling of the south chapel is decked with modern paneling. Overlooking the
ambulatory is a stone 12th-century
sarcophagus containing the relics of Jean de Châtillon, the first bishop of Saint-Malo. At the base of the
chevet is a chest containing the relics of a 2nd-century martyr Saint Célestin, given by the pope
Pius VII to Saint-Malo's last bishop Monseigneur Courtois de Pressigny. This
gisant in the cathedral dates to the 15th century. The statues of "La Foi",
Saint Maur, and
Saint Benoit in the cathedral are the work of
Francesco Maria Schiaffino from Genoa. They date to 1743 and came from an old Benedictine church which subsequently became the Saint-Malo "Palais de Justice". In the south nave is a wooden
pulpit that dates to the 18th century and survived the 1944 bombing. On the west face of the arm of the north transept, there is a fountain known as the "Fontaine Saint-Jean" or "Saint-Côme" which was restored in 1719. The Saint-Côme wing on the north façade was designed and built by the architect
Thomas Poussin between 1593 and 1607. The wing on the south side is known as the "Saint Julien wing" and was built between 1461 and 1486. This wing has an entrance door known as the "Porte de Velours" which was added in 1851. The stalls and the pulpit date to the 18th century and one gisant in the cathedral dates to the 13th century. There is an old baptismal font of 12th-century origin and a 19th-century
baldaquin. The wooden statue titled "Notre-Dame de la Croix du Fief" dates to the 17th century. The
reliquary containing
Jacques Cartier's skull is in a neighbouring chapel.
The main altar The bronze high
altar in the cathedral was consecrated on 8 December 1991 and was the work of the painter
Arcabas and Étienne Pirot. The theme of the altar is the
tetramorph or the four Evangelists appearing in animal form. The
four Evangelists are winged; the wing is an ancient symbol of divinity with each representing the virtues required for Christian salvation. The lion of
St Mark represents courage, resurrection, and royalty. The ox is an ancient Christian symbol of redemption and life through sacrifice and signifies
Luke’s records of Christ as a priest and his ultimate sacrifice for the future of humanity. The eagle of
John represents the sky, heavens, and the human spirit.
Matthew's emblem is a man. These four symbols first appear in the
Book of Ezekiel as the four animals pulling the chariot of Ezekiel's vision (Ezekiel 1. 1-14) and later in St John's Apocalypse (Apoc 4; 7-8), later being adopted by the Church as the emblems of the four Evangelists. The high altar furnishings include desks, an armchair and two stools, an elaborately carved
stoup, and a candlestick.
Organ The pipe organ was built in 1977 by
Koenig and inaugurated in 1980. It is composed of four keyboards, one pedal, and 35 stops. This organ replaced an older one built in 1893 by the
Nantes born Louis Debierre in the romantic style, which was destroyed in 1944. A new choir organ of two keyboards, one pedal, and 18 stops built by Koenig was added in 2014.
Stained glass windows in the nave The stained glass windows are the work of
Max Ingrand. They depict scenes chronicling the history of the city and the cathedral. On the south side of the nave are two windows. One depicts the arrival of the Welsh monk Malo in about 560 at Aaron's hermitage. A small chapel marks the spot where the hermitage stood "La Chapelle Saint-Aaron". The second window shows Jacques Cartier being blessed by the bishop as he leaves on a voyage in 1535 that would lead to the discovery of Canada. On the north side of the nave are three windows. One celebrates the martyrdom in 304 of
Vincent of Saragossa, the patron of the cathedral. Another celebrates the foundation of the
See of Saint-Malo by Jean de Châtillon in 1152. The third depicts the Tro-Breiz pilgrimage to the relics of the seven founders of the Breton bishoprics. Above the main door, hidden by the organ, stained glass depicts the Assumption of the Virgin. ("l'Assomption de ls Sainte Vierge").
The Great Rose window and other stained glass The Great Rose window was the 1968 work of the architect Raymond Cornon and replaced the great rose window destroyed in 1693 during an attack on the cathedral by the English. On the north side of the building, there is a 1970 stained glass window by Jean Gouremelin and Michel Durand which depicts Paul Aurélien, Tugdual, Corentin, Malo, Guillaume, Samson and Patern. Other windows in the choir, the chevet, the ambulatory and the transept were the work of Jean Le Moal and Bernard Allain.
Transept The arms of the transept date to 1623 and contain four windows. File:Saint-Malo (35) Cathédrale Saint-Vincent Transept 01.JPG|View of the north transept File:Saint-Malo (35) Cathédrale Saint-Vincent Transept 02.JPG|View of the south transept File:Saint-Malo (35) Cathédrale Saint-Vincent Transept 03.JPG|The vaulting in the north transept
La Vierge de la Grand’Porte/Notre-Dame de la Grand'Porte This 15th-century marble statue is greatly venerated by the people of Saint-Malo and is also known as the "Miraculeuse Protectrice de la Cité Malouine", as it was associated over the years with various legends and miracles. For hundreds of years, the statue had in fact been placed in a niche over one of the entrances through the city's defensive wall. In 2003, he statue was restored and placed inside the cathedral by the entrance to the sacristy to protect it from the elements. A copy was made and is still kept in the defensive wall niche
Capitals in the nave and transept Several of the
capitals of the
pillars supporting the roof of the nave and transept crossing have carvings that are both grotesque and biblical. These capitals, not easily visible from the ground due to their height, date to the 12th century.
Stations of the Cross There is a "Chemin de Croix" (Stations of the cross) in the cathedral by Henri Chaumont. ==Burials==