‘Salve, regina, mater misericordiae … ad te clamamus … ad te suspiramus’: when this lovely Marian antiphon is sung, whether by one person or many, it is intoned on behalf of all mankind. ‘Ave sanctissima Maria … libera me ab omni malo; ora pro peccato meo’: when this prayer is said, it is the individual who begs the Virgin's intercession, who pleads for her to free him from evil, who asks her to pray for his sins. Prayers in the first person singular, a direct address on the most personal level, I and thou, are usually private. It would seem surprising to find them set to music for several voices, and yet settings begin to appear towards the end of the fifteenth century. What does it mean to sing one of these prayers? For whom do the singers sing: each for himself? each for all the other singers? for the listeners?