Leonardo da Vinci was a renowned thinker, artist, and writer during the Renaissance. He made significant contributions to the fields of art, science, and engineering. He is best known for his iconic painting of the Mona Lisa, as well as his drawings of the Vitruvian Man and the Last Supper. He also made important contributions to the fields of anatomy, astronomy, botany, geology, and mathematics. His inventions included the helicopter, the tank, and the calculator. He also wrote extensively on topics such as philosophy, engineering, and architecture. His works had a lasting impact on the development of the Renaissance and the modern world.