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he result of more than ten years of research in the Biblioteca Reale and Regi Archivi of Turin, Italy, this work presents a definitive edition of all the Leonardo material assembled by Carlo Alberto of Savoy about 1840, including the famous self portrait and the study for the angel of the Virgin of the Rocks , which Berenson acclaimed as “the most beautiful drawing in the world”.

It also includes an appendix on the "Drawings of Artistic Nature in the Codex on the Flight of Birds" as well as an actual size reproduction of the newly discovered Codex Saluzzo 312, which is an unpublished collection of Leonardo’s studies of military architecture compiled about 1840.

A leather covered box (size 335 x 488 mm), with gold stamping, contains 23 plates with facsimile reproductions of the drawings, recto and verso, a text volume of 138 pages, printed on handmade paper and bound in Fabriano paper, and the volume reproducing the Codex Saluzzo 312. The Facsimile is limited to 998 numbered sets world-wide.