Luca Pacioli

15th c. Franciscan Friar, mathematician and publisher of accounting treatise

Luca Bartolomeo de Pacioli (sometimes Paccioli or Paciolo; c. 1447 – 19 June 1517) was an Italian mathematician, Franciscan friar, collaborator with Leonardo da Vinci, and an early contributor to the field now known as accounting. He is referred to as the father of accounting and bookkeeping and he was the first person to publish a work on the double-entry system of book-keeping on the continent.

From Wikipedia, under CC BY-SA. More on occurri.