[1] Miglietta was ordained a priest by Archbishop Francesco De Filippis and incardinated in the Archdiocese of Brindisi-Ostuni on 10 August 1947.
[1] Miglietta would recount that on the day he was to be appointed Archbishop of Conza-Sant'Angelo dei Lombardi-Bisaccia, Pope Paul VI died.
[1] Cardinal Sebastiano Baggio, then Prefect of the Congregation for Bishops, proposed that he be transferred to the Diocese of Ugento-Santa Maria di Leuca.
He was eventually appointed Archbishop-Bishop of Ugento-Santa Maria di Leuca in 1981 (archbishop being conferred as a personal title), a position he held until 14 November 1992 when he resigned for health reasons.
His body remained there for 13 years until Vito De Grisantis, the Bishop of Ugento-Santa Maria di Leuca, presided over the rite of transfer of the body and had it exhumed and buried beneath the altar of St. Francis of Paola in the Basilica of Leuca, in accordance with Miglietta's wishes.