Leonardo da Vinci (1452 - 1519). Leonardo di ser Piero da Vinci, known as Leonardo da Vinci, was an Italian polymath of the Renaissance whose areas of interest included invention, drawing, painting, sculpture, architecture, science, music, mathematics, engineering, literature, anatomy, geology, astronomy, botany, paleontology, and cartography. His major art works include the Mona Lisa (Louvre), Last Supper (Santa Maria delle Grazie, Milan) and Vitruvian Man (Galleria dell'Accademia). His Salvator Mundi sold at Sotheby's in 2017 for $450,000,000. He is widely considered one of the greatest painters of all time, despite perhaps only 15 of his paintings having survived. The Mona Lisa is the most famous of his works and the most popular portrait ever made. The Last Supper is the most reproduced religious painting of all time and his Vitruvian Man drawing is regarded as a cultural icon as well. Leonardo's paintings and preparatory drawings—together with his notebooks, which contain sketches, scientific diagrams, and his thoughts on the nature of painting—compose a contribution to later generations of artists rivalled only by that of his contemporary Michelangelo. Although he had no formal academic training, many historians and scholars regard Leonardo as the prime exemplar of the Universal Genius or Renaissance Man, an individual of unquenchable curiosity and feverishly inventive imagination. He is widely considered one of the most diversely talented individuals ever to have lived. According to art historian Helen Gardner, the scope and depth of his interests were without precedent in recorded history, and his mind and personality seem to us superhuman, while the man himself mysterious and remote. Scholars interpret his view of the world as being based in logic, though the empirical methods he used were unorthodox for his time. Leonardo is revered for his technological ingenuity. He conceptualized flying machines, a type of armoured fighting vehicle, concentrated solar power, an adding machine, and the double hull. Relatively few of his designs were constructed or even feasible during his lifetime, as the modern scientific approaches to metallurgy and engineering were only in their infancy during the Renaissance. Some of his smaller inventions, however, entered the world of manufacturing unheralded, such as an automated bobbin winder and a machine for testing the tensile strength of wire. He is also sometimes credited with the inventions of the parachute, helicopter, and tank. He made substantial discoveries in anatomy, civil engineering, geology, optics, and hydrodynamics, but he did not publish his findings and they had little to no direct influence on subsequent science.