17th century 'B' type, 3 unit cross passage with chimney and floors inserted into Medieval Hall house.
Resources
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application/pdfRCAHMW Dendrochronology Project CollectionOxford Dendrochronology Laboratory Report no 2014/30 relating to the tree-ring dating at Bryn Dinas, Tywyn, September 2014, commissioned by The North West Wales Dendrochronology Project in partnership with RCAHMW.