Ave Regina Caelorum is one of four , with following versicles and prayers, traditionally said or sung after each of the Marian antiphons of the canonical hours . Liturgy of the Hours  The prayer is used especially after  , the final canonical hour of prayer before going to sleep. It is said from the Compline (February 2) through Feast of the Presentation . Wednesday of Holy Week The origins of the prayer are unknown but it can be found included in a twelfth-century manuscript.  
The prayer is associated with indulgences and is listed as
Ave Regina Coelorum in the book of indulgenced prayers. Raccolta 
Ave, Regina Caelorum,
Ave, Domina Angelorum:
Salve, radix, salve, porta Ex qua mundo lux est orta:
Gaude, Virgo gloriosa,
Super omnes speciosa,
Vale, o valde decora, Et pro nobis Christum exora.
V. Dignare me laudare te, Virgo sacrata. R. Da mihi virtutem contra hostes tuos.
Oremus: Concede, misericors Deus, fragilitati nostrae praesidium: ut, qui sanctae Dei Genitricis memoriam agimus; intercessionis eius auxilio, a nostris iniquitatibus resurgamus. Per eundem Christum Dominum nostrum. Amen.