| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Taddeo Altini | |
| Bishop of Civita Castellana e Orte | |
| Church: | Catholic Church |
| Diocese: | Diocese of Civita Castellana e Orte |
| Term: | 1653–1685 |
| Predecessor: | Angelo Gozzadini |
| Successor: | Giuseppe Antonio Sillani Leoncilli |
| Consecration: | 10 November 1653 |
| Consecrated By: | Giovanni Battista Maria Pallotta |
| Birth Date: | 1609 |
| Death Date: | 27 August 1685 (age 82) |
| Previous Post: | Titular Bishop of Porphyreon (1646–1653) |
Taddeo Altini, O.S.A. (1609 – 27 August, 1685) was a Roman Catholic prelate who served as Bishop of Civita Castellana e Orte (1653–1685) and Titular Bishop of Porphyreon (1646–1653).[1]
Taddeo Altini was born in 1603 in Camerino, Italy and ordained a priest in the Order of Saint Augustine.[2] [3] On 17 December 1646, he was appointed during the papacy of Pope Innocent X as Titular Bishop of Porphyreon.On 10 November 1653, he was consecrated bishop by Giovanni Battista Maria Pallotta, Cardinal-Priest of San Silvestro in Capite, with Celso Zani, Bishop Emeritus of Città della Pieve, and Alessandro Vittrici, Bishop of Alatri, serving as co-consecrators. On 10 November 1653, he was appointed during the papacy of Pope Innocent X as Bishop of Civita Castellana e Orte.He served as Bishop of Civita Castellana e Orte until his death on 27 August 1685.
While bishop, he was the principal co-consecrator of: