Do you love art enough to be interested in the story behind it? In the hills above sleepy little Cagnes sur Mer on the French Riviera coastline, hides a real treat for art lovers, especially fans of Pierre Auguste Renoir. A short walk from the centre of Cagnes-sur-mer, Renoir’s final home, now open to the public, is a beautiful sanctuary overlooking olive groves and the glittering Mediterranean. It’s easy to see why, when driven to a warmer climate by agonising rheumatoid arthritis, Renoir chose to live there. World-famous artists seem quite untouchable at times, unreal almost, so it is incredible to be able to walk through the house that was…