Duomo Firenze Cupola 2025: How to Book, What to Expect and Why It Matters

Why the Florentine cathedral sat roofless for 140 years — and what that reveals about Renaissance ambition

The Florence Cathedral (Cattedrale di Santa Maria del Fiore) was begun in 1296 to specifications that explicitly stated the dome would be "of such size that it could cover all the peoples of Tuscany with its shadow" — a statement of civic ambition, not architectural planning. The problem: when the walls reached the level where the dome would begin (1380s), no architect in Europe knew how to build a dome of that scale. The octagonal drum (the base for the dome) was completed in 1418 without a dome, and the Cathedral sat with a massive open hole in its roof for 140 years — covered temporarily with wooden planking during severe weather. The 1418 competition to solve the problem attracted entrants from across Italy; the commission was eventually awarded jointly to Brunelleschi and Lorenzo Ghiberti (Ghiberti's role was later effectively eliminated as Brunelleschi's methods proved successful). The 140-year gap between conception and solution is the clearest evidence of how far ahead of its technical capacity the medieval architectural ambition had run — and how genuinely revolutionary Brunelleschi's solution was when it finally came.