Nicholas Roerich, (October 9, 1874 - December 13, 1947) (Russian: Николай Константинович Рерих), was a Russian painter, theosophist and philosopher. He was the father of Tibetologist George Roerich (a.k.a. Yuri Roerich) and artist Svetoslav Roerich. Nicholas and his wife Helena Roerich were co-founders of the Agni Yoga Society.