“Who is buried in Grant’s tomb?” is a trick question. The correct answer is “Nobody”.
Yes, you don’t bury people in tombs, you entomb them.
Thanks, I never realized that! The things you learn on FR!
Next time I meet Groucho, I’ll be ready.
(Groucho) “For $2 I’ll tell you where to find coal.”
(Contestant) “As a geologist, I can find it myself.”
(Groucho) “In the dictionary, and that’s an old gag.”
Hiram Ulysses Grant, better known as Ulysses S. Grant, and his wife, are interred in the mausoleum, so yeah, no one is known to be buried there. Given the long history of human occupation, perhaps there’s some remains underneath everything. :^)