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Keywords from Image Description:
Gregory Antiphonary of Hartker of Sankt Gallen. en Pope Gregorius dictating the gregorian chants Antiphonary of Hartker of the monastery of Saint Gall Cod Sang Hartker of SanktGallen See google id YwUAAAAIAAJ pg PA lpg PA dq AntiphonaryofHartker source bl ots ToPZDPtK sig yRdPeotgCvknasmnputkMHsQ hl en ei bIwStyEGYLEMLrhPcJ sa