Neo-Classicism art emerged in the late 18th to 19th century as a revival of classical Greco-Roman styles and themes that emphasized harmony, clarity, restraint and idealism. Key works included Ingres' "Apotheosis of Homer", Chalgrin's "Arc de Triomphe", Appiani's "The Olympus", and David's "The Death of Marat", all drawing inspiration from classical antiquity.