Ms. verse; written and illuminated in Tuscany, Italy, probably in Florence, in the second half of the 15th century.
Text: 124 rhymed stanzas of 8 lines each.
Astronomical-geographic poemetto in ottave; gives information about the world, the marinaresche compass and other things, adding observations, notes about travel and designs.
Decoration: 20 marginal illustrations (colored wash drawings of maps and celestial spheres); 1 white-vine illuminated initial.
The illumination of M.721 is unfinished. The map of Crimea on fol. 24v was not completed.