Vaynol Chapel, situated to the north of Vaynol Old Hall, dates to the mid 16th century. It comprises a simple rectangular structure; with an additional South porch, built by William Williams in 1596. The walls consist of rubble and gritstone, under a modern slate roof. The interior has been modernised and veneered in marble.
Source: Caernarvonshire Inventory, Vol. 2.
L. Moore, RCAHMW, 27th April 2012