The oldest and most famous bridge across the Arno, the Ponte Vecchio was built in 1345 by Taddeo Gaddi to replace an earlier version. The characteristic overhanging shops have lined the bridge since at least the 12th century. In the 16th century, it was home to butchers until Cosimo I moved into the Palazzo Pitti across the river. He couldn’t stand the stench, so he evicted the meat cutters and moved in the classier gold- and silversmiths, and jewelers occupy it to this day.
The Ponte Vecchio’s fame saved it in 1944 from the Nazis, who had orders to blow up all the bridges before retreating out of Florence as Allied forces advanced. They couldn’t bring themselves to reduce this span to rubble—so they blew up the ancient buildings on either end instead to block it off. The Great Arno Flood of 1966 wasn’t so discriminating, however, and severely damaged the shops. Apparently, a private night watchman saw the waters rising alarmingly and called many of the goldsmiths at home, who rushed to remove their valuable stock before it was washed away.