page_title: Mynydd Illtud
section_title: Archaeology
hierarchical_section_title: Mynydd Illtud / Archaeology
caption_attribution_description: English: Twyn y Gaer iron age hill fort at Mynydd Illtud (Libanus, Powys), viewed from the east side. The picture also shows the "gate" in the bank and the footpath leading to it.
context_page_description: Mynydd Illtud is an extensive area of common land near Libanus, Powys, Wales, located in the Brecon Beacons National Park and some three miles south-west of Brecon. The common is an undulating plateau lying between 330 and 370 metres above sea level. Its highest points are 381 metres at Allt Lom and 367 metres at Twyn y Gaer trig point overlooking the valley of the River Usk. Twyn y Gaer is the site of an Iron Age hill fort.
context_section_description: The Iron Age hillfort of Twyn y Gaer (51.9417°N 3.4708°W) sits atop the grassy mound on the northern tip of the common. In the centre of the hill fort is a trig point. Though little remains of the ancient structure, the location affords good views towards the peaks of Pen-y-Fan and Corn Du as well as to the northern slopes of the Black Mountains and the river Usk. These excellent views of the surrounding area may explain why its naturally defensive spot was chosen for a settlement. Research by A. Hogg on this hill fort was published in 1982.
  The course of a Roman road, Sarn Helen can be traced from south-west to north-east across the common.
  Near Twyn y Gaer are a few pillow mounds which date from the 18th and 19th centuries, when rabbits were bred on a large scale for their meat and fur.
  Llanilltyd church and associated earthworks (51.9240°N 3.4975°W) are also of interest, as is Bedd Gwyl Illtyd.
caption: Twyn y Gaer iron age hill fort at Mynydd Illtud (Libanus, Powys), viewed from the east side. The picture also shows the "gate" in the bank and the footpath leading to it.
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