[1][2] Bonaventura Secusio was ordained a priest in the Order of Friars Minor Observants.

[2] In 1593, he was appointed the Minister General of the Order of Observant Friars Minor.

[2] On 10 March 1599, he was appointed by Pope Clement VIII as Latin Patriarch of Constantinople and consecrated bishop on 14 March 1599 by Alessandro Ottaviano de' Medici, Archbishop of Florence with Fabio Blondus de Montealto, Latin Patriarch of Jerusalem, and Domenico Bolano, Bishop of Canea, serving as co-consecrators.

[1][2] In 1600, he resigned as Minister General of the Order of Observant Friars Minor.

[1][2] On 10 June 1609, he was appointed by Pope Paul V as Bishop of Catania where he served until his death in March 1618.