About The duomo The Duomo in Florence, Italy is an iconic symbol of the city. Construction on the cathedral began in 1296 and was not completed until 1436. The Duomo is a massive structure, measuring in at 414 feet long, 157 feet wide, and 230 feet high. The cathedral is home to a number of important religious relics, including Michelangelo's "David" and the "Madonna and Child."
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