Ordo officii divini in solemnitate S. Genovefae. Quando sacrae ejus reliquiae in processione generali deferuntur.
This is a 1652 Paris liturgical chant book printed by Jean de La Caille for the feast of Saint Geneviève, with its office and procession rites. The four pages show square-note plainchant set on red five-line staves, with red rubrics and initials marking each section. A designer could take from them the rhythm of dense black neumes against red ruling, and the strong contrast of red headings and drop capitals on cream paper.
