Leone Battista Alberti
Leon Battista Alberti (February 18, 1404 – April 25, 1472) was an Italian author, artist, architect, poet, priest, linguist, philosopher, and cryptographer, and general Renaissance humanist polymath.  In Italy, this first name is usually spelled "Leone", but Alberti is known as Leon.  Alberti's life was described in Giorgio Vasari's Vite.