At the end of the day, it is a holy place and there are rules about your attire. Here's your packing list for the Vatican City Tour: Vatican Museum, Sistine Chapel And St. Peter's Basilica
Any outfit that covers your knees and shoulders: think summer dresses, cotton and linen dresses.
Carry a scarf instead of buying one like me!
Apply a layer of sunscreen. In case you need recommendations, check out our article, 20 Sunscreens For All Skin Types.
Carry 2 bottles of water per person especially if you're going in the summer. The only fountain you will get access to comes after the museum and before the St. Peter's Basilica. That's an hour away guys!
Sunhat/Fedora, if you're that person.
Sunglasses. Compulsory for kids too.
Wear comfortable shoes with thick soles and good heel support.