Oxford Art Online This link opens in a new window
This is a great place to start when researching about the visual arts.
Comprehensive encyclopedia of art, with authoritative and comprehensive reference sources for all visual arts: painting, sculpture, architecture, photography, drawing, printmaking, design, and decorative arts. Includes links to images from libraries and museums. Contains: Grove Art Online, The Oxford Companion to Western Art, Encyclopedia of Aesthetics, The Concise Oxford, and The Dictionary of Art Terms.