|Abbreviation||Order of the Most Holy Annunciation (O.SS.A.)|
|Type||Roman Catholic religious order|
|Headquarters||Ordine della Santissima Annunziata |
Via Pietro Dellepiane 49,
San Cipriano di Serra Riccò,
16010, Genova (Italia)
The Order of the Most Holy Annunciation (Latin: Ordo Sanctissimae Annuntiationis), also known as the Turchine or Blue Nuns, as well as the Celestine Nuns, is a Roman Catholic religious order of contemplative nuns formed in honour of the mystery of the Incarnation of Christ at Genoa, in Italy, by Blessed Maria Vittoria De Fornari Strata.
Pope Clement VIII approved the religious order on 5 August 1604, placing it under the Rule of Saint Augustine.
The religious order currently has monasteries in Portugal (Fatima), in Italy (Rome), and in the Philippines.