Pentre Ifan is the name of an ancient manor in the civil parish of Nevern, Pembrokeshire, Wales. It contains and gives its name to the largest and best preserved neolithic dolmen in Wales. The Pentre Ifan monument is a Scheduled Ancient Monument and was one of three Welsh monuments to receive legal protection under the Ancient Monuments Protection Act 1882. It is now in the guardianship of Cadw, with public access. (Wikiwand)