Olin Library
Olin Library has levels, not floors. Starting at the bottom: The basement level is Level B; above that is Level A; above that is Level 1, which is at ground level; above that is Level 2; above that is Level 3.
Olin Library has levels, not floors. Starting at the bottom: The basement level is Level B; above that is Level A; above that is Level 1, which is at ground level; above that is Level 2; above that is Level 3.