My husband and I were recently in Florence, and purchased the Firenze card to avoid lines and because we sightsee like it's our job. We discovered inadvertently that there was a way to legitimately squeak 4 days out of the card's 3 day validity. At the Duomo, the Firenze card had to be shown at their admission area (#7) and exchanged for a Duomo ticket, which is then valid for 48 hours. We happened to be using the Firenze card for this on the last day of its eligibility. So, we climbed the Duomo one day, activating the ticket, and then went on to other covered sights. The next day, with the Duomo admission ticket, we visited the rest of the Duomo sights. This was a nice discovery, and made the card a worthwhile purchase. Of course, the Firenze card was worth it for us to be able to skip the long and hot July lines.
Very clever! Too bad that doesn't work as well for the Colosseum/Forum/Palatine on the Roma pass: I notice that they've outwitted clever tourists by requiring that the 2nd visit occur within the life of the pass.
"Therefore, if the Colosseum is chosen either as one of the first two sites visited for free, or as one of the sites visited at a reduced price ticket, then the archaeological area of the Roman Forum and the Palatine Hill can be visited on the following day, as long it falls within the card’s period of validity. "
Well done! Thank you for sharing this. Another way to squeeze out a little more is to activate your Firenze pass around 10-11 am. The pass is for 72 hours. On the last day (fourth day), you can enter a site before 10 am like Santa Croce or SMN. Once inside, you can visit as long as you wish.