| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Ambrogio Landucci | |
| Titular Bishop of Porphyreon | |
| Church: | Catholic Church |
| Term: | 1655–1669 |
| Predecessor: | Taddeo Altini |
| Successor: | Honuphrius Ippoliti |
| Birth Date: | 1596 |
| Birth Place: | Siena, Italy |
| Death Date: | 16 February 1669 (age 73) |
Ambrogio Landucci, O.S.A. (1596 – 16 February 1669) was a Roman Catholic prelate who served as Titular Bishop of Porphyreon (1655–1669).[1] As papal sacristan, he was involved in the removal and authentication of relics from the catecombs.
Ambrogio Landucci was born in Siena, Italy and ordained a priest in the Order of Saint Augustine. In 1634, he was elected prior of the Monastery of the Holy Saviour in Lecceto, outside Siena which he enriched with a library and archives.[2] A He was an historiographer of the monastery at Lecceto.
Landucci later served as one of two sacristans at the Apostolic Palace, a privilege reserved to the Augustinians. On 30 August 1655, he was appointed during the papacy of Pope Alexander VII as Titular Bishop of Porphyreon. On 12 September 1655, he was consecrated bishop by Giovanni Battista Maria Pallotta, Cardinal-Priest of San Pietro in Vincoli, with Patrizio Donati, Bishop Emeritus of Minori, and Taddeo Altini, Bishop of Civita Castellana e Orte, serving as co-consecrators. He served as Titular Bishop of Porphyreon until his death on 16 February 1669.[3]
During a transfer of relics in 1656, Landucci found in the cemetery of Ciriaca (or San Lorenzo) on Via Tiburtina a wall mosaic, which he passed to Agostino Chigi, nephew of Pope Alexander VII. It is now in the Museo Pio Cristiano.[4]
He also wrote a manuscript describing procedures for extracting relics from the catecombs.[5]
While bishop, he was the principal consecrator of:
and the principal co-consecrator of: