Paolo Uccello was an Italian Renaissance artist known for his pioneering work with linear perspective in paintings like the Battle of San Romano from the 1430s. The document also mentions Jacopo Bellini, a 15th century Italian painter, and references his painting The Beheading of John the Baptist held in the Louvre museum in Paris. It provides links to pages on Khan Academy and the Louvre museum website about these two Renaissance artists and their works that demonstrate pictorial techniques from the time period.