Letters as architecture: The alphabet from Luca Pacioli’s De Divina Proportione, 1509

Franciscan friar and mathematician Luca Pacioli wrote several books on mathematics and geometry. Among them, in 1497, Pacioli conceived De Divina Proportione, a treatise in vulgar on mathematical proportions applied to geometry and art with a specific focus on architecture and the human figure. The work was finally published in 1509 featuring illustrations by Leonardo da Vinci.