CGFA
Carol Gerten Fine Arts: Jan Van Eyck
This online gallery contains copies of many van Eyck paintings. Also includes a link to view his biography. A good source for reports and papers.
California Digital Library
E Scholarship Editions: The Arnolfini Betrothal
A scholarly treatment of the difficulties that surround modern-day interpretations of the Arnolfini double portrait, including exhaustive description and analysis of medieval betrothal and marriage customs.
The National Gallery (UK)
National Gallery: The Arnolfini Portrait
Van Eyck's famous Arnolfini portrait is illustrated and described. Includes a Zoomable Pictures link that lets viewers examine the painting in detail.