Source: SK-Bra (Bratislava) Missale of Bratislava I EC Lad. 3Folio: 010rbSequence: 1Full text: Tecum principium in die virtutis tuae in splendoribus sanctorum ex utero ante luciferum genui teFeast: Nativitas DominiOffice: MASSGenre: GrCantus ID: g00542Mode: 2