Source: PL-PŁsem MsEPl 12 Antyfonarz z Płocka, pars de sanctisFolio: 100vSequence: 4Feast: LaurentiiOffice: LGenre: APosition: 5Cantus ID: 001643Mode: 8Differentia: G1Full text: Beatus Laurentius orabat dicens gratias tibi ago domine quia januas ingredi merui