Paolo Dagomari di Prato

Paolo Dagomari da Prato (1282–1374), known in Latin as Paulus Geometrus, was a noted Florentine mathematician and astronomer, such a maestro dell'abbaco that he gained the epithet Paolo dell'Abbaco. Franco Sacchetti called him Paolo Arismetra e Astrologo and Giorgio Vasari Paulo Strolago or Paolo Astrologo (astronomer). He reputedly had 6,000–10,000 pupils over the course of his life, being praised by contemporaries like Giovanni Gherardi da Prato, Filippo Villani, and Giovanni Villani in his Cronica.