Just past the left bank is the Panthéon. The Panthéon was originally a church, transformed by the Revolution into a mausoleum for people like Voltaire and Zola. This was back in the days when your fans and loved ones would pour into the streets upon your death, write lines from your books on banners and wave them around, and carry your coffin to your swanky burial place like the Panthéon. Alternatively, you'd get dug up years after your death and relocated from your original cemetery to get a 5-star room at the Panthéon.
The tombs of the Panthéon are the main attraction, where you can visit the likes of Victor Hugo and the Curies. It’s dark, cold, and quiet – pretty much what you’d expect in a tomb tour. We found it slightly less flashy than what we expected (i.e. most of the tombs are simple white coffins with the names of their inhabitants engraved on the front), and we were a bit disappointed that most of the tombs are kept in small rooms behind iron gates (making picture taking a bit of a challenge).
The Panthéon also contains a working model of Foucault's pendulum. That's right, it's more than just a book by Umberto Eco. Foucault's pendulum experiment was conducted in the Panthéon in 1851, demonstrating the rotation of the earth. The pendulum appears to rotate over a 24 hour period, when in fact, it's the earth that rotates beneath it. Unfortunately, you won’t be able to get anywhere near the pendulum, and finding an audio guide that’s either not being used by someone or is in working order is a difficult task. Nevertheless, it’s still a magnificent sight and a fascinating experiment to learn about.