This was an excellent tour. Having been met at the foot of the Ponte della Paglia before the agreed meeting time, we were taken inside and introduced to Allesandra our excellent guide. This was a 2 hour tour with history of the Palace, how the system worked, lots of interesting and funny stories and the "secret" area - which has been left as it was used, was fascinating. A wonderful building with lots of intrigue. I would definitely recommend this tour - but you must book well beforehand!