In the "ricetto", critics have noted that the recessed columns in the vestibule make the walls look like taut skin stretched between vertical supports. This caused the room to appear as if it mimics the human body, which at the time of the Italian Renaissance was believed to be the ideal form. The columns of the building also appear to be supported on corbels so that the weight seems to be carried on weak elements. Because of the seeming instability of the structure, the viewer cannot discern whether the roof is supported by the columns or the walls. This sense of ambiguity is heightened by the unorthodox forms of the windows and, especially, by the compressed quality of all architectural elements, which creates a sense of tension and constrained energy.