Or·a·to·ry n.; pl. Oratories A place of orisons, or prayer; especially, a chapel or small room set apart for private devotions.
An oratory [temple] . . . in worship of Dian. --Chaucer.
Do not omit thy prayers for want of a good oratory, or place to pray in. --Jer. Taylor.
Fathers of the Oratory R. C. Ch., a society of priests founded by St. Philip Neri, living in community, and not bound by a special vow. The members are called also oratorians.