Pietro Diana
Pietro Diana was an Italian cardinal.Life
Born in Piacenza, he became provost of the college of Sant'Antonino a Piacenza. Pope Lucius III made him cardinal deacon of San Nicola in Carcere in the consistory of 6 March 1185. In 1188 Pope Clement III made him cardinal-presbyter, with the titulus of Santa Cecilia in Trastevere. He was papal legate in Lombardy under Pope Clement III, who entrusted him with mediating between the warring cities there. He was also legate in Sicily under Pope Celestine III and under Pope Innocent III in Germany, where he preached crusade. He took part in the papal elections of 1185, October 1187, December 1187, 1191 and 1198.
