Florence Cathedral (Duomo) & Brunelleschi's Dome

Florence Cathedral and Brunelleschi's dome define the city's skyline, and climbing inside the dome is one of Europe's most extraordinary architectural experiences. The cathedral itself is free to enter, but the real prize is the EUR 30 combined ticket that gets you up 463 steps into Brunelleschi's engineering masterpiece. Built between 1420-1436, this is the world's largest masonry dome, constructed with a revolutionary double-shell technique that still baffles engineers today.

The dome climb takes you between the inner and outer shells where you can see the construction techniques up close, then inside to view Vasari's Last Judgment frescoes from an impossibly intimate perspective. The narrow spiral staircases feel medieval and claustrophobic, especially in summer heat, but emerging onto the external lantern delivers sweeping views across Florence's terracotta rooftops to the Tuscan hills beyond. The cathedral floor looks tiny from up there, and you truly understand why this dome was considered impossible to build.

Book your dome climb at least a week ahead during peak season, it sells out daily. The cathedral nave is underwhelming compared to the dome experience, so don't feel obligated to linger there. If dome tickets are sold out, Giotto's Bell Tower next door offers nearly identical views with shorter queues for the same EUR 30 ticket. Most people rush through, but take your time on the lantern to really absorb the panorama.