Pen y Fan same noun "ban", in its plural form "bannau", is found in the Welsh name for the Brecon Beacons: "Bannau Brycheiniog". There is no one standard translation of "Pen y Fan", but 'the mountain's peak' or 'the beacon's summit' are both possible translations. Pen y Fan is formed from various units of the Old Red Sandstone which were laid down during the Devonian period. The lower slopes of the mountain are formed from the sandstones and mudstones of the Senni Formation whilst the upper slopes are formed from those of the Brownstones Formation. The very summit, like that of neighbouring Corn
Pen y Bryn Pen y Bryn Pen y Bryn is a two-storey manor house, in Abergwyngregyn, Gwynedd, in north-west Wales, adjacent to the A55, five miles east of Bangor, eight miles west of Conwy. It is constructed mainly of broken stone, with roughly dressed quoins and a slate roof. The house is situated within Garth Celyn, a double bank and ditch, overlooking the Menai Strait to Anglesey. A smaller house was immediately adjacent in 1811 when Sir Richard Colt-Hoare recorded it; this was demolished by 1815. The present structure incorporates a four-storey stone tower. The present roof timbers were dated by dendrochronology to