De Arte Venandi cum Avibus (lit. 'On The Art of Hunting with Birds') is a Latin treatise on ornithology and falconry written in the 1240s by the Holy Roman Emperor Frederick II. One of the surviving manuscripts is dedicated to his son Manfred. Manuscripts of De arte venandi cum avibus exist in a two-book version (Manuscripts at Rome, Vienna, Paris (2x), Geneva and Stuttgart) and in a six-book version (Manuscripts at Bologna, Paris, Nantes, Valencia, Rennes, and Oxford).[1]