A horse painting from 15,000-13,000 B.C. discovered in the caves at Lascaux appears to have lines scrawled on the wall above it, and similar symbols have been found at other sites in France.
This image is a derivative of a horse from Lascaux a replica of which is held in the Brno museum Anthropos. HTO, the copyright holder of this work, releases it into the public domain. This applies worldwide.