The historic center of Florence is flat and compact—you could walk from one end to the other in half an hour. In the middle of everything is the Duomo, with its huge dome towering over the city's terra-cotta rooftops. Radiating from the Duomo are Renaissance-era neighborhoods identified by their central churches and piazzas. Though the majority of sights are north of the Arno River, the area to the south, known as the Oltrarno, has its charms as well.
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