Problems with light

Sometimes taking a photograph of a painting can be a challenge.  The paint could be glossy and reflect too much even if a flash isn't used.  And sometimes the art just absorbs all the light and doesn't show well.  The painting I'm showing here is of the former.  It is a very dark painting, needs a lot of natural light to properly see all it has to offer.  In the photo it actually shows up brighter than the actual painting.  No matter what conditions I try to photograph it in it is never 100% accurate.