Letter A: drawing from the work by Fra Luca Pacioli di Borgo San Sepolcro

Letter A: drawing from the work by Fra Luca Pacioli di Borgo San Sepolcro (Luca Bartolomes Pacioli dit Luca di Borgo, Italian ecclesiastic and mathematician around 1445-1517) “De divina proportione” (divine proportion) written in Milan between 1496 and 1498 and published in Venice in 1509. Text translation: This letter T takes its shape from its edge and circle. Its thick leg must be exactly as it was said of the leg of the I. Its cross-section must have a thickness of half that of that of the big leg, like that of the top of the E and the F. and end at a half-head of the edge of its edge. It will have a perfect grace.