Bonaventura Secusio, O.F.M. Obs. was a Catholic prelate who served as Bishop of Catania (1609–1618), Bishop of Messina (1605–1609), Bishop of Patti (1601–1605), the Latin Patriarch of Constantinople (1599–1618), and as Minister General of the Order of Observant Friars Minor (1593–1600).

The Archdiocese of Catania is a Latin Church diocese of the Catholic Church in Sicily, southern Italy, with its seat in Catania. It was elevated to an archdiocese in 1859, and became a metropolitan see in 2000. Its suffragans are the diocese of Acireale and the diocese of Caltagirone.