Humayun's Library

While the tomb of Humayun remains in excellent condition, the buildings that surround it have not fared the weathering of time as well. This building, if I remember correctly, is the library of Humayun, which he used quite eagerly, until one day the poor monarch tripped on its staircase, broke his neck, and died. Being the supreme leader of an empire is no excuse for klutziness.