Overview
The Dome That Changed Architecture
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The Florence Cathedral (Cattedrale di Santa Maria del Fiore) took 140 years to build. Work began in 1296 under Arnolfo di Cambio. By 1418, the walls were complete but the dome remained unbuilt — and nobody knew how to build it. The gap in the roof, 44 metres wide, was the largest in the world, and the cathedral stood open to the sky for 16 years.
Filippo Brunelleschi, a goldsmith with no formal training as an architect, won the competition to solve the problem. His solution was radical and unprecedented: a double-shell dome with a herringbone brick pattern and no temporary wooden scaffolding (which would have been impossible to erect at that height and scale). He invented new hoisting machines, developed a completely new method of bricklaying, and kept his structural methods secret to prevent rivals from copying or undercutting him. The dome was completed in 1436.
It remains the largest masonry dome ever built. When Michelangelo designed St Peter's dome in Rome, he said: "I will build something bigger, but not more beautiful."
The Complex
Five Sites, One Passepartout
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The Cathedral Interior (Free)
Entry to the main body of the Cathedral is free. The scale is overwhelming — the nave is 153m long. The most important things to see inside: the equestrian portraits of two condottieri (mercenary generals) painted on the walls by Uccello and Castagno — they look like sculptures but are flat paintings on the wall. Also: the famous clock face above the entrance, painted by Paolo Uccello, which runs backwards.
Crypt of Santa Reparata (Passepartout ✓) — 1:30 PM confirmed
Below the current Cathedral floor lies the original church of Santa Reparata, dating from the 5th century. Archaeological layers from Roman, early Christian, and medieval periods are exposed. Brunelleschi's tomb is here — a plain stone slab, remarkably modest for the man who built the dome.
Museo dell'Opera del Duomo (Passepartout ✓)
The must-see museum, directly behind the Cathedral. Two extraordinary works: the original Gates of Paradise by Ghiberti (Michelangelo named them) — ten gilded bronze panels with Old Testament scenes, considered the first high-relief sculpture of the Renaissance. Also: Michelangelo's Bandini Pietà (c.1547) — a late self-portrait, with Michelangelo's own face as Nicodemus holding the dead Christ. He intended it for his own tomb, then smashed it in frustration; a student later repaired it.
Baptistery of San Giovanni (Passepartout ✓)
The octagonal baptistery, one of Florence's oldest buildings (11th century), is where every Florentine was baptized for centuries — including Dante. The north doors by Ghiberti (his first set, 1403–1424) won the competition that launched the Renaissance. The south doors by Andrea Pisano (1336) show John the Baptist's life. Go inside for the Byzantine mosaic ceiling — a Last Judgement covering the entire dome.
Giotto's Campanile (Passepartout ✓ — book separately)
The bell tower, begun by Giotto in 1334, offers arguably better views of the Duomo dome from the side than the Dome climb itself offers. 414 steps, narrower, more dramatic. Consider this instead of the Dome for those who want views but are worried about the main climb's physical demands.
The Dome Climb
463 Steps to the Lantern
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The dome climb is unlike any other climb in Italy. You ascend between the two shells of the dome — walking through the structural space Brunelleschi designed, seeing the herringbone brickwork up close, passing through low tunnels and up steep stone staircases that get progressively narrower. Halfway up, you reach the interior gallery and look down at the Vasari/Zuccari frescoes of the Last Judgement on the dome's inner surface — from directly above.
At the very top: a narrow walkway around the exterior lantern with 360-degree views. On a clear April evening, you can see to the Apennines in the north and south to Siena.
- Entrance: Porta della Mandorla (north side of Cathedral)
- Download the Duomo app on Wi-Fi before your visit — bring your own earphones (no rentals)
- No elevator. 463 steps. Narrow passages near the top — not suitable for severe claustrophobia
- Allow 1h15m total
- Elders: Caffè Gilli in Piazza della Repubblica (5 min) is a gorgeous historic café for the wait