I thought this article was worth posting a link for. The earliest marriage of art and music from Discovery News:
At least 12,000 years ago, the most popular musical events might have taken place in torch-lit caves next to walls covered in art, according to new archaeological research in France.
Stone Age-era caves there bear paintings located in the most acoustically resonant places, where sound lingers or echoes.
The first cathedrals, theaters and concert halls, researchers now theorize, may have been inspired by musical performances held in caves. [read more]