Tŷ-Mawr was a small-scale hall-house of gentry-status built in Snowdonia on the mountain slopes above Nantmor. Tree-ring dating commissioned by the Dating Old Welsh Houses community project dated the building to 1529. House history here: http://www.peoplescollectionwales.co.uk/content/t%C5%B7-mawr-nantmor-%E…