A nice tour that establishes a lot of the sociopolitical context in which the Pantheon was built
This is a very nice guided tour of the Pantheon. It's in French, so be sure that you are comfortable in that language before signing up for it. I learned quite a few things about the Pantheon that I didn't know, despite the fact that I'd already visited it several times. In particular, the guide's observations on the sociopolitical context of its building, and in particular the role of monumental architecture in that context, were quite illuminating.