Video of Piazza Santa Croce after the flood
Getty Images has some archival footage of Florence right after the flood (click the above image to play the video). You can watch the clips on their site - or if you are a film maker you can buy what you need for your project. The shot above is a quick scan of Piazza Santa Croce. You can see the church of Santa Croce in the background, and when the camera starts to pan, on the right is Palazzo Antellesi. The statue of Dante, now in front of the church, was still in the middle of the piazza in 1966.