Indulgences attached to the Rosary A partial indulgence is gained, under the usual conditions, when praying a third of the Rosary (5 decades) continuously (i.e., one can't say a decade, go wash the dishes, and return to say the other decades). A plenary indulgence is gained, under the usual conditions, when it is prayed by a family group or publicly in a church or oratory. The decades' Mysteries must be announced, and the Mysteries meditated on.