2017 marks 300 years since the birth of one of Wales's most eminent hymn writers, William Williams Pantycelyn. To commemorate the occasion, the series brings you a special programme from Llanfair ar y Bryn Church in Llandovery where Williams is buried. Professor Wyn James from Cardiff University will discuss his life and work and there will be performances by The Three Baritones and Côr Bro Nest.