Biblioteca Riccardiana

It is located, along with the Biblioteca Moreniana, in Palazzo Medici Riccardi.
Among its other works it possesses an apocryphal version of Leonardo's Libro di pittura and a Confessional by Lorenzo, Leonardo's brother, a wool merchant in Florence who died in 1531. The Codex Riccardianus 2275, "Precetti della pittura di Leonardo da Vinci. Manoscritto originale di Stefanino della Bella (1610-1664)" [Precepts on painting by Leonardo da Vinci. Original manuscript by Stefanino della Bella], was published by Pagani and Grazioli in Florence in 1792.
In the "Summario" [Summary] (Ms. 1920) by Biagio Bonaccorsi, Chancery Assistant to Machiavelli, we find the plan for deviating the Arno in 1504, at the height of Riglione, toward the Stagno di Livorno, as planned by Leonardo.