Paper; ff. [2], 201, [2]; mm. 200_265; original binding in parchment. Beautiful copy written in an elegant cursive hand (early 17th c.). The Institutione at ff. 3r-38v; the Compendio at ff. 39r-196v.
Paper; ff. [1], 191 [171-191 blank]; old binding in vellum; possibly autograph by Francesco Piccolomini (at any rate different from all the other extant copies which are clearly calligraphic ones realised by scribes).