The first answer is very comprehensive.
I would add that the Egyptian design style for wall paintings and paintings on papyrus illustrates their fear of the unknown. Every space is filled and the surface is layered with "registers" or lines upon which the images are standing, sitting or carefully arranged. This approach has been analyzed to mean that their culture feared unknown spaces, unknown endings, and they had ways to handle this fear for the citizens.
The Egyptian literature is very entwined with the art work since much of both depend upon the symbols and the hieroglyphics used. Few Egyptians could use or read the hieroglyphics so the symbols were very important to convey meaning.
The materials used and the colors applied were also full of meaning for these art forms. Gold, lapis lazuli, and gems were to imply wealth and importance while the different colors used for the skin indicated gender.