If he had completed the work he very likely would have made an entrance from the piazza, as roomy and convenient, as the curious staircase in the corner of the cloister is awkward and cramped.

It was completed by Giorgio Vasari, whose letters to Michael Angelo about this difficult work, and Michael Angelo's chaotic replies, belong to a much later period.

The curious manner of cutting up the wall by pilasters and framed spaces cannot properly be judged without the bronze bas-reliefs that they were intended to contain.

Considered as a method of hanging or displaying a collection of works of art they are admirable, and might well serve for the interior decoration of a great museum.

The vestibule, with its curious stairway, large consoles, and green and white colour, leaves an impression of power and eccentricity in architecture like the effect of the serious caricatures of Leonardo da Vinci in drawing.