A ferial psalter from 15th-century Germany whose calendar includes, in red ink, the feasts of Dominic 'patris nostri' ranked as 'totum duplex' (5 August) and Sebaldus (19 August) showing that the book was made for the Dominicans of Nurnberg.
Full Citation
New York, Columbia University, Rare Book and Manuscript Library, Benjamin MS 3, ff. 4v-5r