I have previously shown the grave of  William Perkin, a great british organic chemist. On a recent visit to  Paris, I went to see the crypt in the Panthéon, the great french secular necropolis. What a contrast to Perkin!  The Curies have a crypt all to themselves (VII), and other great french scientists such as Bertholet and Langevin as well as mathematicians such as Lagrange who are also interred in other crypts.