Upon his death, Baldassare Peruzzi continued the work, and supplied a series of new designs, restoring the ground-plan of the church to its original shape.

He was succeeded in the reign of Paul III.

by Antonio di S.Gallo, who once more reverted to the Latin cross, and proposed a novel form of cupola with flanking towers for the facade, of bizarre rather than beautiful proportions.

After a short interregnum, during which Giulio Romano superintended the building and did nothing remarkable, Michael Angelo was called in 1535 to undertake the sole charge of the edifice.

He declared that wherever subsequent architects had departed from Bramante's project, they had erred.