We bought last minute tickets (just entry) the day before. I can’t believe we were originally going to miss this! I’m so glad we didn’t. It ended up being one of my favourite days. The outside of the pantheon is stunning in itself, but the inside is amazing. Once inside, we paid an extra €2 to listen to a couple of videos about the pantheon and its history which was worth it. There’s a small gift shop inside, and the staff working it are lovely.
We went at 9am, which is when it opened. The staff said it’s the best time to come as not as busy. Not sure if it’s just the time of the day, but inside the pantheon everyone was quiet, the atmosphere was nice and calming. (Again, not sure if that changes later on in the day when it gets busier). Really would recommend to anyone!
You can also head just behind the pantheon to the church Santa Maria Sopra Minerva, which has free entry. It’s beautiful inside, would definitely recommend going there after!
katlola
If you want to skip the line, get the Oltre Il Pantheon tour from the Musei Italiani app but book a couple days in advance. You get a really fascinating look into the pantheon through the ages as well as go inside the walls. The tour ends by popping you inside the pantheon and letting you roam free. You can then just download an audio guide.
mikex2017