Bryn Eryr

Bryn Eryr is an archaeological site near Llansadwrn, Anglesey, Wales, where the remains of an Iron Age farmstead, consisting of three roundhouses, have been excavated. Excavations took place in the period between 1985 and 1987, and were carried out by the Gwynedd Archaeological Trust.

Two of the roundhouses have been reconstructed at the St Fagans National Museum of History in Cardiff. Reconstruction of the buildings began in 2015 and was carried out mainly by volunteers, including schoolchildren. It was part of a development financed by a £11.5 million grant from the UK's Heritage Lottery Fund. It was opened to the public in 2016.