Robert Fludd’s De Divinis Numeris (1619), or, On Divine Mathematics, is a treatise on numerical symbolism. The treatise expounds on the explorations of number found in the Macrocosm volume, which proceeds according to a variety of methods derived from the combinatoria of Abraham Abulafia and Ramon Lull, and Pico della Mirandola’s Christianized Kabbalah. Fludd’s Divine Mathematics is found in the Technical History of the Microcosm Tractatus I, Sectionis I, Liber I.