Other
History of Painting: Greek and Roman Painting
This resource, although focusing more on Greek painting, contains some insight information on ancient Roman painting, primarily the Roman frescoes.
Web Gallery of Art
Web Gallery of Art: Decoration of the Stanze in the Palazzi Pontifici
This website provides information on and images of Raphael's frescoes that he painted at the Stanze while in Rome. The images of the frescoes are stunning.
Other
Atelier Saint Andre: Byzantine Iconographers
This site reveals the work of a living community of Byzantine iconographers--artists who create relgious paintings for the Eastern Orthodox Church. Features background information on their traditions, aesthetics, and techniques.
Ducksters
Ducksters: Middle Ages for Kids: Art and Literature
From paintings, frescos, and manuscripts the middle ages was full of art and literature. This site contains information about the art and literature during the Middle Ages and Medieval times.