In 1522, the Board of Works for the cathedral church of S.Petronio at Bologna decided to complete the facade.

Various architects sent in designs; among them Peruzzi competed with one in the Gothic style, and another in that of the Classical revival.

Great differences of opinion arose in the city as to the merits of the rival plans, and the Board in July invited Michelangelo, through their secretary, to come and act as umpire.

They promised to reward him magnificently.

It does not appear that Michelangelo accepted the offer.