Urb. gr. 154 includes the Schedographia of the Byzantine Grammarian, Manuel Moschopoulos. In this work, the Byzantine author presents educational exercises drawn from Biblical and Homeric topics for grammatical analysis. George Baiophoros, the scribe, used several recycled manuscripts in his prolific scribal activity in Constantinople in the early fifteenth century. The Vatican Library has several manuscripts that were copied or annotated by Baiophoros, some of which include recycled manuscripts (Vat. gr. 19, Vat. gr. 21, Vat. gr. 157). This manuscript found its way to the Library of Urbino whence it arrived to the Vatican Library in 1657.
In 1423, George Baiophoros used two folios in Urb. gr. 154 (ff. 121 + 126, 122 + 125) recycled from a copy of Simplicius’ commentary on Aristotle’s Categories. The original philosophical manuscript which also provided the writing surface for Vat. gr. 21 was copied in the thirteenth or fourteenth century. It is a rare example of parchment in an informal script used for a philosophical text. Normally, philosophical texts of similar kinds were copied on paper.
Urb. gr. 154, ff. 126r + 121v and Ott. gr. 214, f. 7r
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