Pontificale romanvm Clementis VIII primum : posteà uerò Vrbani VIII ; auctoritate recognitum ; cum figuris
This is a 1683 Roman liturgical manual of the Catholic Church, the Pontificale Romanum revised under Clement VIII and Urban VIII, printed in Rome by the Holy See for bishops performing church rites. The pictures are close views of square and diamond noteheads on red-ruled staves in chant notation, showing the printed plainchant that a designer might use for a graphic motif of clean geometric shapes on lined paper.
