Part 1 of Essay
was one of the greatest inventors and scientist ever. His genius was unbounded by time and technology, and was driven by his curiosity, and his intuitive sense of the laws of nature. He was an internationally popular inventor, scientist, engineer, architect, painter, sculptor, mathematician, musician, anatomist, astronom ....

Part 2 of Essay
.... only six pieces during seventeen years in Milan. They included Portraits of Cecilia Gallerani, "The Virgin of the Rocks", "The Last Supper", a ceiling painting of the Sala delle Asse in the Milan Castello Sforzesco. Also there were three other paintings that either disappeared or never existed in the first place. They are, a "Nativity" said to have belonged to Emperor Maximilian, a "Madonna" that Ludovico Sforza announced as a gift to the Hungarian king Matthias Corvinus, and the portrait of one of Ludovico's mi ....