Llwyn Bryn-Dinas is an Iron Age hillfort on the north side of the Tanat valley, about west of the village of Llangedwyn, in Powys, Wales.
Description The hillfort has a single rampart, about north to south and east to west, following the contours of a prominent hill. The area is about . There is a simple inturned entrance on the south-east.Christopher Houlder. Wales: An Archaeological Guide. Faber and Faber, 1978. Page 91.
There was excavation in 1983. It was found that the site was first occupied in the late Bronze Age, about the 10th–9th century BC; the defences were enlarged about the 4th–3rd century BC, during the Iron Age. Built into the rear of the rampart was an Iron Age smithy, for bronze-casting and iron-working, probably to serve the requirements of the settlement.The Iron Age, 600 BC - AD 50 The Clwyd-Powys Archaeological Trust, accessed 18 May 2017.
See also Hillforts in Britain List of Scheduled prehistoric Monuments in Powys (Montgomeryshire)
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