مقاطعة كاتانيا
Born at Castiglione di Sicilia in the Province of Catania, Sicily, Alibrandi was ordained priest on 1 November 1936, and obtained a Doctorate on Divinity from the Pontifical Lateran University and a Doctorate on Civil and Canon Law. He entered the Diplomatic Corps of the Holy See on 1941 serving for five years in the Vatican Secretariat of State and later, as Apostolic Internuncio to Indonesia (1958),