Cochwillan is a medieval hall house situated in the lower Ogwen Valley, south of the village of Talybont in the parish of Llanllechid, between Bethesda and Llandygai.
[1][2] Cochwillan was built around 1465 by William ap Gruffudd who for supporting Henry Tudor at the Battle of Bosworth was rewarded by being named Sheriff of Caernarvonshire.
In the 17th century John Williams, Archbishop of York combined the hall with the Penrhyn estate.
[3] Many of its original architectural elements are still intact, including the hammerbeam roof of three bays, and unusual for the time, a lateral fireplace.
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