Many visitors search in vain for Victor Hugo's grave at Père-Lachaise; why do they never find it?

The answer

Only his close relatives — parents, brother, son and grandsons — rest in the family vault, in Division 27; Victor Hugo himself was buried at the Panthéon in 1885, after a grand state funeral, and not at Père-Lachaise.

This question belongs to the “Unusual Stories” series of the Père-Lachaise quiz: ten questions, a story behind every right answer.