RICHARD SWINESHEAD’S LIBER CALCULATIONUM IN ITALY: THE CODEX BIBL. NAZ. SAN MARCO, LAT. VI.226 AND ITS SIGNIFICANCE

The article presents a description of the contents of MS. Venice, Bibl. Naz. San Marco, Lat. VI.226, which have not been properly described up to now. Contrary to its older descriptions, the codex contains the whole set of treatises constituting Richard Swineshead’s Liber calculationum. The close affinity of this copy with the manuscripts of Swineshead’s work preserved in the Biblioteca Apostolica Vaticana, i.e., Vat. lat. 3064 and Vat. lat. 3095, as well as some of its features and internal notes that one finds in this copy enable us to formulate new hypotheses and conclusions regarding both the composition of the Liber calculationum and its dissemination in fifteenth-century Italy.