The Codice Atlantico is the largest collection of Leonardo's notes and drawings ever assembled.  It consists of 1119 individual sheets that include 1750 drawings and 119 pages of notes by Leonardo and is currently preserved in Milan's Amrosiana Library.

The notes and drawings were brought together and compiled into the Codice Atlantico by the 16th century sculptor Pompeo Leoni.  This extraordinary work outlines Leonardo's diverse interests and knowledge of not just drawing and anatomy, but engineering, mathematics, mechanics and biology.  The codex includes Leonardo's designs for war devices, as well as his designs for flying machines, bridges and buildings.

His handwritten notes include biographical anecdotes, and meditations on philosophy and mathematics.  The name of codex is derived not from the Atlantic Ocean, but from its atlas like dimensions, referring to the term "atlantes", which is used in library science to represent extremely large volumes or multiple atlases.

Facsimile volumes 1 & 3 are on display in the Sherman Art Library reference room.