On 19 July 1591, Lorenzo Celsi was appointed during the papacy of
Pope Gregory XIV as
Bishop of Castro del Lazio. On 10 August 1591, he was consecrated bishop by
Ludovico de Torres,
Archbishop of Monreale, with
Agapito Bellomo,
Bishop of Caserta, and
Gaspare Cenci,
Bishop Emeritus of Melfi e Rapolla, serving as co-consecrators. He served as Bishop of Castro del Lazio until his death in 1603. ==Episcopal succession==