Opened for just over a month, I highly recommend taking this rooftop tour in English. Our tour guide was so passionate about all the domes in our 360 degree view we learned so much. Seeing how all the dome frescoes are supported up close was amazing. 6-10€ per person.
From their website: “500 domes on the rooftops of Duomo di Napoli
An experience at a height of 40 m to discover Naples from a different perspective. A tour route from the Cappella degli Illustrissimi to the rooftops of the Cathedral.
Currently not accessible to people with motor or visual disabilities/difficulties.”