It looks like a Fabergé egg. But, in fact, the 150-foot-wide dome, which represents the birthplace of the Renaissance, is an immense, double-shelled, herringbone brickwork feat of masonry. The largest dome of its kind, Il Duomo towers over Florence's red-roofed skyline, and comprises part of the Basilica di Santa Maria del Fiore. Designed by Filippo Brunelleschi in the 15th century, the dome has 463 brutally steep steps which lead up to a breathtakingly beautiful panoramic view of the city.
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