Gradual from St. Katharinental (Thurgau)
A liturgical gradual, a choir book of chant for the Mass, made around 1312 at the Dominican convent of St. Katharinental in Thurgau, Switzerland, for nuns to sing from. Both pages show square musical notation on red and black staves beside large historiated initials, with the left page's tall initial holding a column of small scenes, and the right page's framed initial a crowded assembly of figures under arches, all set in gold, red, blue and green on cream vellum with a tight, orderly text block a designer could borrow for layout.

