"Ponte Vecchia" (Old Bridge) is the oldest bridge in Florence. I don't know why the bridge was built like this, in fact it seems that some constructions had been added afterwards. Nowadays all this constructions are occupied by shops, most of them sells jewelry (at least at the time of the photo...).
This picture was taken from an Uffizi Gallery window. Uffizi Gallery is one of the main museums of Florence, where beautiful Renascence paintings are in exibition.
It was taken with a Canon snapshot and digitalized with a Genius Color Page SP2X scanner.