Jehan Cousin was born in Sens, France around 1522, the son of the famous painter and sculptor Jehan Cousin (“the elder,” ca. 1490-ca. 1560) who was often compared to his noted contemporary, Albrecht Dürer. Having trained to become an artist under his father, Jehan le jeune showed as much talent as his father, and their work is nearly indistinguishable even to the expert. Just before his death, Jehan the Elder published his noted work Livre de Perspective in 1560 in which he noted that his soon would soon be publishing a companion entitled, Livre de Pourtraicture.
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Cousin, Jehan. Livre de pourtraiture. (Paris: Jean Leclerc, 1608). Image from National Library of Medicine
The book is one of the most famous on the subject of artistic anatomy and was printed again and again into the late 17th century.