There are many possible resting places for your body once you die, and a sepulcher is the best option if you want a fancy room made entirely from stone. Think it over, because you can only choose once.
Crypts, mausoleums, sarcophagi, sepulchers: each one is a place to bury someone, with slight variations. A sepulcher (or if you’re British you’ll spell it sepulchre) is basically a stone room with a stone coffin where your body lies. The word comes from the Latin sepulcrum, which means “burial place,” for obvious reasons. Pronouncing sepulcher could trick you, because the ch actually sounds like a k: "SEP-ul-ker."