A manuscript that was attributed to Zeno, matching a known title of one of Zeno's works, Περὶ φύσεως ("On Nature)," was discovered in 1949 in an Old Armenian translation. In 1956 it was translated into Russian and published with an extensive commentary. Subsequent philological investigation concluded that the author could not have been Zeno and was instead an anonymous Christian philosopher of the late sixth century or a little later, writing in the tradition of ancient philosophy, but doing so as a Christian. He is now known as Pseudo-Zeno. His work shows an integration of Christian and philosophical concepts, but in a very restrained way.