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This Renaissance 'superdome' took more than 100 years to build
Florence's Cathedral of Santa Maria del Fiore astonished the world with its colossal dome ingeniously designed by Filippo Brunelleschi.
Crowning glory
The great dome that tops the Cathedral of Santa Maria del Fiore, in Florence, Italy, rises majestically above the city. To this day, at 180 feet in diameter, it is still the largest brick-and-mortar dome in the world.
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