In Wales Illustrated in a Series of Views by Henry Gastineau, published in 1810, it states: "Near the town are some remains of an ancient fortress called Castell Cadwgan, thought to have been erected by king Cadwgan, about the year 1148."
In the late-18th and 19th centuries, the picturesque ruins of Harlech began to attract visits from prominent artists, including John Cotman, Henry Gastineau, Paul Sandby, J. M. W. Turner and John Varley.
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