Paolo Uccello (1397 – 1475) was an Italian painter and mathematician who was notable for his pioneering work on visual perspective in art. In his book Lives of the Artists Giorgio Vasari wrote that Uccello was obsessed by his interest in perspective and would stay up all night in his study trying to grasp the exact vanishing point. While his contemporaries used perspective to narrate different or succeeding stories, Uccello used perspective to create a feeling of depth in his paintings. His best known works are the three paintings representing the battle of San Romano. Paolo worked in the Late Gothic tradition, emphasizing colour and pageantry rather than the classical realism that other artists were pioneering.