Possibly the most hauntingly beautiful WELSH song written for ages, composed by a true "GOG" genius: ROBAT ARWYN.(How great thou art Cymro)The proof of which is evident in the amount of renditions here on RU-vid alone by some exceptionally talented Welsh singers. I've finally come to the conclusion that it's not really important which rendition is best. IT'S THE SONG AND NOT THE SINGER. (Although secretly I DO listen to Bryn Terfel's performance more than the others.