Medieval longhouse measuring 18 metres by 7 metres, aligned east-west, sited on the southern edge of a minor stream. There are lazy beds between the longhouse and the stream. It is located on the north eastern side of Foel Wyllt, which is a hill on the southern side of the Afon Dysynni, about four miles north east of Tywyn. The longhouse was discovered during the Royal Commission's programme of archaeological aerial reconnaissance by Toby Driver on 2nd October 2015.
RCAHMW, 10th October 2018.