 His greatest fame lies with his influential poem "Cannwyll y Cymry" (usually translated as The Welshman's Candle), a collection of poetical teachings and moral guidance.Rhys Prichard was believed to have been born in the house at 33 High Street Llandovery, which was owned by his parents at the time.Later in his life he built a larger house on the same plot of land, and this house was demolished in the mid-20th century.