Nicholas Roerich (1874–1947) was the founder of a movement to protect cultural artifacts, whose symbol, a maroon on white emblem consisting of three solid circles in a surrounding circle, has been used as a peace banner. In 1935 a pact initiated by Roerich was signed by the United States and Latin American nations, agreeing that "historic monuments, museums, scientific, artistic, educational and cultural institutions" should be protected both in times of peace and war. According to the Roerich Museum, "The Banner of Peace symbol has ancient origins. Perhaps its earliest known example appears on Stone Age amulets: three dots, without the enclosing circle. Roerich came across numerous later examples in various parts of the world, and knew that it represented a deep and sophisticated understanding of the triune nature of existence. But for the purposes of the Banner and the Pact, Roerich described the circle as representing the totality of culture, with the three dots being Art, Science, and Religion, three of the most embracing of human cultural activities. He also described the circle as representing the eternity of time, encompassing the past, present, and future. The sacred origins of the symbol, as an illustration of the trinities fundamental to all religions, remain central to the meaning of the Pact and the Banner today."