All day is needed to visit the Vatican. I booked before I went which saved time and the worry that I was not using an unauthorised one from the street. I used Dark Rome Tours booked through Viator.com and it went smoothly. Lovely tour guides. Very organised and informative. The tour takes 3 hours but you need extra time if you want to go up to the top of the dome and also go inside the church we ran out of time which was a shame.
The Vatican is amazing! highly recommended try to avoid Wednesdays.
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