Federigo Zuccaro, the brother of Taddeo, was employed by Pope Gregory
XIII. in the Pauline chapel. While proceeding with his work, however, he
fell out with some of the Pope's officers; and conceiving himself
treated with indignity, he painted an allegorical picture of Calumny,
introducing the portraits of all those individuals who had offended him,
decorated with asses' ears. This he caused to be exhibited publicly over
the gate of St. Luke's church, on the festival day of that Saint. His
enemies, upon this, made such complaints that he was forced to fly from
Rome, and passing into France, he visited Flanders and England. As soon
as the pontiff was appeased, he returned to Rome, and completed his work
in the Pauline chapel, fortunate in not losing his head as the price of
such a daring exploit.