|The Arnolfini Portrait (1434) - oil on oak panel|
by Jan van Eyck
A dog in a painting often represents loyalty and fidelity. For instance in Jan Van Eyck's- Th Arnolfini Wedding portrait, 1431. Where the dog represents fidelity and as a result the marriage obligations between the pair. As the two stand on the 'holy ground of matrimony'.
There is another argument for this portrait which will be covered in a later post.