Giorgio Vasari's life of Leonardo da Vinci, from his Lives of the Artists. The Lives of the Most Excellent Painters, Sculptors, and Architects is a series of artist biographies written by 16th-century Italian painter and architect Giorgio Vasari, which is considered "perhaps the most famous, and even today the most-read work of the older literature of art", "some of the Italian Renaissance's most influential writing on art", and "the first important book on art history". (Wikipedia, CC BY-SA 4.0)