His brother was a successful art dealer and helped Vincent out and believed in him, but wasn't able to get much traction with his work. He was pretty well conne

His brother was a successful art dealer and helped Vincent out and believed in him, but wasn't able to get much traction with his work. He was pretty well connected in this way. However, he wasn't liked (Vincent) by many people and struggled to build valuable connections with other artists, etc. due to his awful personality, which was in large part due to his mental illness I'd assume. His brothers wife (his brother died from syphilis shortly after him) ended up with all his work and believed in it too. She was able to impress other with it and held a large show featuring his work a few years after his death and this is how he came into prominence.