Use the adjective stratified to describe something with many layers, either physically (like the layers of your skin) or socially (a kingdom with the king at the top and peasants at the bottom).
If you’ve ever studied geology, you’ve heard about strata: layers of sand, clay, and rock spread out one on top of the other. A lot of things can be described like that. The Amazon jungle is stratified — with massive trees up high and shrubbery below. The division between rich and poor people is an example of a stratified society. And when you spread peanut butter onto bread, and then add jelly on top of that, well, sure, that’s a stratified sandwich.
