The so-called Grammatica del Donato (Codex Trivulziano 2167) is a richly decorated parchment codex, which together with the Liber Iesus creates an extraordinary diptych of 'educational manuscripts' for the young Massimiliano Sforza, firstborn of Ludovico il Moro. The manuscript, prepared during the last five years of the fifteenth century, contains a grammatical text belonging to the literary genre of the Ianuae, followed by the Disticha Catonis. The writing of the text is an elegant humanistic book in which the hand of the well-known calligrapher Giovanni Battista Lorenzi is recognized, while among the illuminators there are some of the most famous artists of the time: Giovanni Ambrogio de Predis, the Master of Epitalamio of Giasone del Maino, Giovan Pietro Birago and the Maestro of Anna Sforza. The iconography of the so-called Grammatica del Donato, as well as that of Liber Iesus, is justified in the context of a precise political intent by the Moor, aimed at legitimizing himself and his own dynastic succession.

This work, belonging to the permanent collection, is open to the public for conservation reasons only on the occasion of temporary exhibitions.