Girolamo Ricciulli was born in Cosenza, Italy in 1580.^[2]' On 5 December 1616, he was appointed during the papacy of Pope Paul V as Bishop of Belcastro.^[1][2] On 13 December 1616, he was consecrated bishop by Giovanni Garzia Mellini, Cardinal-Priest of Santi Quattro Coronati, with Francesco Sacrati (cardinal), Titular Archbishop of Damascus, and Vincenzo Landinelli, Bishop of Albenga, serving as co-consecrators.^[2] He served as Bishop of Belcastro until his death on 7 August 1626.^[1][2]

While bishop, he was the principal co-consecrator of:^[2]

• Bernardo Florio, Bishop of Canea (1621);
• Paulus Pucciarelli, Bishop of Andros (1621); and
• Bernardino Piccoli, Coadjutor Bishop of Strongoli (1622).

• Cheney, David M. "Diocese of Belcastro". Catholic-Hierarchy.org. Retrieved June 16, 2018. (for Chronology of Bishops) ^{[self-published]}
• Chow, Gabriel. "Titular Episcopal See of Belcastro (Italy)". GCatholic.org. Retrieved June 16, 2018. (for Chronology of Bishops) ^{[self-published]}