The interior of Notre-Dame is equally majestic, featuring a grand nave, elaborate rib vaults, and towering columns that create a sense of elevated space and height. The choir and high altar, situated at the core of the cathedral, are embellished with intricate carvings and artistic masterworks, inviting visitors to linger and reflect.

Notre-Dame Cathedral consists of a choir and apse, a short transept, and a nave flanked by double aisles and square chapels. Its central spire was added during restoration in the 19th century, replacing the original, which had been completely removed in the 18th century because of instability.