October 1493. Florence is still mourning the death of Lorenzo the Magnificent. Columbus' ships have only recently reached the New World. The modern financial system has just come into being thanks to the adaption of the letter of credit. Meanwhile, Milan is experiencing a renaissance under the leadership of Ludovico il Moro. Those wandering in the courtyards of Milan's Castle or along the Navigli canals often encounter a strange man in his forties,...