GWYNEDD, WALES—The remains of three people were unearthed near the ruins of Harlech Castle, where a new visitor center is under construction. The castle, listed as a UNESCO World Heritage site, was built by Edward I in the thirteenth century. Iestyn Jones of Archaeology Wales said that the bodies had probably been buried when the site was used as a cemetery and might have been belonged to people who were killed sometime between 1461 to 1468, a period when the castle was constantly under seige during the War of the Roses. Pottery at the site dates to the seventeenth and eighteenth centuries.