Florence Cathedral
Florence Cathedral, officially the Cathedral of Saint Mary of the Flower (Duomo di Firenze), stands in Florence, Italy. It is the city’s main Catholic church and the seat of its archbishop.
Construction began in 1296 under designer Arnolfo di Cambio, in a Gothic style. The building was completed in 1436, with the famous brick dome engineered by Filippo Brunelleschi. The exterior is faced with colorful marble, and a grand Gothic Revival façade was added in the 19th century by Emilio De Fabris.
The cathedral sits in the Piazza del Duomo with two nearby landmarks: the Baptistery and Giotto’s Campanile. Together, they form part of the historic center of Florence, a UNESCO World Heritage Site since 1982.
Size and shape:
- Length about 153 meters, width about 90 meters.
- The central nave is about 38 meters wide.
- The dome rises to about 114.5 meters high.
- The floor area covers around 8,300 square meters.
- The dome is the largest masonry dome ever built.
The dome and its construction:
- Brunelleschi developed a revolutionary brick dome built without external buttresses.
- It is a double shell with internal ribs and innovative weight-bearing features, including hidden “chains” to keep the dome from spreading.
- The lantern on top was completed in 1461, and a gilded copper ball finished the summit in 1469.
- The dome’s height, with the lantern, reaches about 114.5 meters.
The exterior and interior:
- The original façade, begun in the 14th century, was never finished in its time. It was finally completed in 1887 by Emilio De Fabris in a white, green, and red marble design.
- Inside, the space is grand and spare. Many artworks were moved to the cathedral museum over time, but the church once housed works by famous artists such as Donatello, Lorenzo Ghiberti, and Giorgio Vasari.
- The interior also features notable stained glass windows and a grand mosaic above the main entrance showing the Coronation of the Virgin.
Layout and Marian focus:
- The cathedral is dedicated to the Virgin Mary, reflecting Florence’s identity as the “city of flowers.”
- The design and artworks tell a Marian story, guiding worshippers from the earthly life of Mary to her heavenly crown.
Other features and history:
- In 1475, Paolo Toscanelli cut a meridian line in the dome to mark the solstice; it has been restored and is used for ceremonial observations on special occasions.
- Over centuries, the massive dome developed cracks. It has been carefully studied and monitored with sensors to ensure its safety, and restorations have helped preserve the structure.
- Today the Florence Cathedral remains one of the world’s great churches, a symbol of Florence’s artistic and architectural achievements.
This page was last edited on 3 February 2026, at 12:51 (CET).