A deep dive into the Notre-Dame Cathedral interior

The Nave

The nave, reserved for the faithful during services, was designed to accommodate a large number of worshippers, shaping the overall dimensions of the cathedral. It rises from the ground to the vaulted ceiling, forming the central vessel of the building.
The design emphasizes verticality, with pillars, arcades, pilasters, and columns highlighting this upward flow. These vertical elements are balanced by horizontal arcades and capitals, creating a harmonious rhythm between the vertical and horizontal that defines the nave’s graceful proportions.

Ambulatory, Galleries & Pillars

The ambulatory, located beyond the row of columns, allows the faithful to walk around the central space. Notre-Dame features a double row of columns forming the unique double aisles, and the ambulatory of the choir is distinctive in medieval architecture.
Located above the pillars, the galleries are the same width as the aisles and feature paired windows with pointed arches. They are designed for choristers, with the grand organ placed in the western gallery.
The round pillars, adorned with Corinthian capitals, resemble those of ancient buildings. In the second row, simple pillars alternate with those featuring engaged columns, carved from a single stone, which support the arches of the galleries.

The Altar & Choir

At the heart of the cathedral is a grand high altar made of marble. Behind the altar is a dramatic sculpture, Pietà, designed by Nicolas Coustou in the early 18th century, depicting Mary cradling Jesus after the crucifixion.
The choir area features elaborately carved wooden stalls from the 14th century. These are decorated with biblical scenes and saints.

The Organ

One of the largest in the world, Notre Dame’s organ has 8,000 pipes spread across five keyboards.
Some pipes date back to the 18th century, though the organ has undergone multiple restorations.
It survived the 2019 fire and remains a symbol of resilience.
The design of the vaulted ceilings and stone walls creates exceptional acoustics, perfect for organ music and choral singing.

Stained Glass Windows

The three Rose Windows (West, North, and South) are among the most famous features.
Each tells biblical stories and is an example of medieval stained glass craftsmanship.
The stained glass and rose windows transform sunlight into a kaleidoscope of colors that dance across the stone walls and floors.
The North Rose, completed in 1250, has 80 panels and depicts scenes from the Old Testament.
Smaller windows in the upper walls, the clerestory windows, allow natural light to flood the interior, creating an ethereal atmosphere.

Side Chapels

There are 29 side chapels, each with unique artwork, altars, and sculptures.
Chapels were often sponsored by wealthy patrons or guilds during the medieval period.
Chapel of the Holy Sacrament: Known for its peaceful ambiance, perfect for prayer.
Chapel of St. Anne: Contains a 14th-century statue of St. Anne teaching the Virgin Mary.

The Treasury

Notre-Dame's treasure, once one of the richest in Europe, consisted of liturgical artifacts. It was lost during the French Revolution, with items scattered or repurposed.
After the Concordat, it was reassembled through donations from the Empire, popes, and sovereigns. The treasure includes relics from the Sainte-Chapelle, Saint Louis' linen shirt, and a penance discipline.
It was plundered again in the 1830 riots, but Viollet-le-Duc’s designs helped restore it in the mid-19th century. Regularly expanded since then, the treasure's display was updated in 2012.

Sculptures and paintings inside Notre-Dame

Pietà by Nicolas Coustou

Located at the high altar, this dramatic sculpture depicts the Virgin Mary holding the body of Christ.

The Crown of Thorns

Notre Dame interior with Crown of Thorns relic displayed in Paris, France.

The Crown of Thorns, one of Christianity's most venerated relics, is housed at Notre Dame Cathedral in Paris. Believed to be the crown placed on Jesus Christ’s head during His crucifixion, it holds profound religious significance as a tangible connection to the Passion. The relic, now a circular band of rushes without its original thorns (distributed to other churches over centuries), was acquired by King Louis IX of France (Saint Louis) in 1238. Originally housed in Sainte-Chapelle, a Gothic chapel constructed specifically to protect it, the Crown was later moved to Notre Dame for safekeeping during the French Revolution.

The Crown is typically displayed in a crystal and gold reliquary and is venerated on special occasions, particularly Good Friday. During the 2019 fire that devastated Notre Dame, the Crown of Thorns was rescued by firefighters and clergy and temporarily housed in the Louvre Museum during the cathedral's restoration. Upon the completion of repairs, it is expected to return to Notre Dame, where it continues to inspire faith and devotion among pilgrims and visitors from around the world.