The closest airports are Florence (FLR), Pisa International Airport (PSA), and Rome Leonardo da Vinci–Fiumicino Airport (FCO). Flying into either Pisa or Rome will require you to make your own travel arrangements either to Florence or to the Castello.
Transportation will be provided from Florence to Castello di Ristonchi around 3:00 pm on September 19th. Transportation will also be provided from Castello di Ristonchi back to Florence on September 22, departing the castle no later than 11:00 am
Please check your passport expiration date ASAP. It must be valid for at least 6 months after your return date to the United States. If you do not have a passport, start applying now! Double-check that you have signed your passport.
Europe is planning to implement a pre-departure digital "visa" system - ETIAS - at some point in 2025 and will be required of all visitors. We will post updates as we find them, but until then here is the website for reference ETIAS - European Union (europa.eu)