Luca Pacioli was a true Renaissance man, with knowledge of literature, art,

mathematics, business and the sciences, at a time when few could even read. Born about 1445 at Borgo San Sepulcro in Tuscany, Frater Luca Bartolomes Pacioli acquired an amazing knowledge of diverse technical subjects – religion, business, military science, mathematics, medicine, art, music, law and language. He accepted the popular belief in the inter-relatedness of these widely varying disciplines and in the special importance of those, such as mathematics and accounting, which exhibit harmony and balance.

His friend Leonardo da Vinci helped prepare the drawings for Pacioli"s 1497 work, Divina Proportione; In turn, Pacioli is reputed to have calculated for da Vinci the quantity of bronze needed for the artist"s huge statue of Duke Lidovico Sforza of Milan.

Around 1482, after completing his third treatise on mathematics, Pacioli, who like many of his time sought preferment as a teacher, became a Franciscan friar. He traveled throughout Italy lecturing on mathematics, and, in 1486, completed his university education with the equivalent of a doctorate degree.

Pacioli never claimed to have invented double entry bookkeeping. Thirty-six years before his monumental treatise on the subject, Benedetto Cotrugli wrote Delia Mercatura et del Mercante Perfetto (Of Trading and the Perfect Trader), which included a brief chapter describing many of the features of double entry. Although this work had not been published for more than a century, Pacioli was familiar with the manu and credited Cotrugli with originating the double entry method.

Pacioli was about 50 years old in 1494 – just two years after Columbus discovered America – when he returned to Venice for the publication of his fifth book, Summa de Arithmetica, Geometria, Proportioni et Proportionalita (Everything About Arithmetic, Geometry and Proportion). It was written as a digest and guide to existing mathematical knowledge, and bookkeeping was only one of five topics covered.

The Summa"s 36 short chapters on bookkeeping, entitled "De Computis et uris" ("Of Reckonings and Writings"), were added, "in order that the subjects of the most gracious Duke of Urbino may have complete instructions in the conduct of business," and to, "give the trader without delay information as to his assets and liabilities." (All quotes from the translation by J.B. Geijsbeek, "Ancient Double Entry Bookkeeping: Lucas Pacioli"s Treatise," 1914).

Perhaps the best proof that Pacioli"s work was considered potentially significant, even at the time of publication, was the very fact that it was printed on November 10, 1494. Gutenberg had, just a quarter century earlier, invented metal type, and it was still an extremely expensive proposition to print a book