The resulting raft distributed the weight of the massive outer walls over a large area. However, the weight of the masonry outer walls in relation to the relatively lightweight interior deformed the raft during the course of a century, and today portions of the building have settled as much as 29 inches. This deflection is clearly visible in the theater lobby, where the mosaic floor takes on a distinct slope as it nears the outer walls. This settlement is not because of poor engineering but the fact the design was changed during construction. The original plan had the exterior covered in lightweight terra-cotta, but this was changed to stone after the foundations were under construction. Most of the settlement occurred within a decade after construction, and at one time a plan existed to shorten the interior supports to level the floors but this was never carried out.