Take home a Met Museum souvenir. This artful "M" comes from Divina proportione (1509), a book of woodcut illustrations in The Met collection by the Franciscan mathematician and theorist Fra Luca Pacioli (Italian, ca. 1445-ca. 1514). Inspired by Leonardo da Vinci's (Italian, 1452-1519) Vitruvian Man, a study of ideal anatomical proportions, Pacioli perfected the construction of the Roman alphabet according to geometric principles, stressing the shape of simple, monumental letters. From 1971 until
