BBC history team solves riddle of Llywelyn By Ben Fenton (Filed: 31/01/2006) One of the last great mysteries of the history of the independent Welsh nation was apparently solved yesterday by a group of English historians working for the BBC. For centuries, people living in and around the chicken farm called Pen y Bryn on top of a hill overlooking the Menai Straits in Caernarvonshire have been convinced that it is a royal place. More than that, they all firmly believed that the 36-acre farm was the last remnant of the palace of Llywelyn, the first and last prince of...