Some human behavior never change, such as the urge to doodle in the margin of a book.

See more doodles onErik Kwakkels blog.

A man and a woman engaged in a game of bowling, circa 1300.

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Pen trials from Oxford, Bodleian Library, Lat.

c. 66 (15th century).

Doodle discovered in a 13th-century law manuscript (Amiens BM 347).

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Conches, Bibliotheque municipale, MS 7 (main text 13th century, doodle 14th or 15th century).

800-year-old doodles found in a Missal, a book used during Holy Mass

Medieval dachshund.

Shark with Napoleon hat.

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Paris, Bibliotheque Sainte-Genevieve, MS 98.

Paris, Bibliotheque Mazarine, MS 3475 (15th century).

Whale doodles found in 19th century logbooks of whaling vessels.

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(Left) Medieval rockstar.

London, British Library, Sloane MS 554.

(Right) Medieval air guitarist.

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Amiens, Bibliotheque municipale, MS 220 (9th century).

Leiden, Universiteitsbibliotheek, BPL MS 111 I, 14th-century doodle.

Leiden, University Library, MS BPL 6 C (13th century).

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