Monument to Pope Paul III (1549-77) by Guglielmo della Porta (Alessandro Farnese, Canino near Viterbo, b.1468/r.1534-49) The monument to Pope Paul III is the work of Guglielmo della Porta (c. 1515-77). It was the first monument to a pope to be erected in the basilica. The statues of Justice and Prudence are said to be portraits of the pope's beautiful sister Giulia and his mother Giovanna Caetani.
The statue of Justice was originally naked. However, following the instructions of a later pope, who, while admitting that justice should keep nothing hidden, insisted on the statue being clothed.