[alcidesfonseca]

I believe it to be historically true, but Dependent Haskell might change this (https://ghc.serokell.io/dh see unification of types and kinds).

In Lean (and I believe Rocq as well), the Type of Int is Type 0, the type of Type 0 is Type 1, and so on (called universes).

They all come from this restriction.

[aureianimus]

With respect to Lean/Rocq, that's true, with the subtle difference that Rocq universes are cumulative and Lean's are not.