Leonardo de Piero Dati, La sfera

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Written in an Italian cursive hand, with an ornamental initial in red at the beginning of each stanza. There are 62 water-colours drawings, 2 on each leaf, with two stanzas to each leaf.
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1. ff. Gregorio Dati, La sfera in Italian [Incomplete.]

La sfera is an astronomical-geographical poem written in ottava rima, probably by the merchant Gregorio Dati (1362-1436), though some catalogues credit authorship to his brother Leonardo de Stagio Dati, friar and humanist, master general of the Dominican order from 1414-26. On this tract see Leonardo Dati, Raffaello Gualterotti, Giovanni Maria Tolosani, Gustavo Camillo Galletti, La sfera libri quattro in ottava rima scritti nel secolo 14. da Leonardo di Stagio Dati ... aggiuntavi La nuova sfera pure in ottava rima di Gio. M. Tolosani da Colle ... e L'America di Raffaello Gualterotti (Molini., 1859)

For scholarship concerning authorship of the work, see Clemens, Raymond. “Medieval Maps in a Renaissance Context: Gregorio Dati and the Teaching of Geography in Fifteenth-Century Florence.” Cartography in Antiquity and the Middle Ages: Fresh Perspectives, New Methods. Richard Talbert and Richard Unger, eds. Leiden: Brill, 2008, 237–56 and Bertolini, Lucia. “L’attribuzione della Sfera del Dati nella tradizione manoscritta,” in Studi offerti a Gianfranco Contini dagli allievi pisani. Florence: Le Lettere, 1984, 33–43.

Gregorio Dati, La sfera

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