Source: PL-PŁsem MsEPl 12 Antyfonarz z Płocka, pars de sanctisFolio: 039vSequence: 5Feast: GregoriiOffice: MGenre: RPosition: 3.1Cantus ID: 007329Mode: 5Full text: Orante beatissimo ad dominum Gregorio Sanata est plebs romana a peste inguinaria