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Britain's Prince Charles, Prince of Wales (C) and his wife Britain's Camilla, Duchess of Cornwall (2R), tour Dongal Castle on May 25, 2016. Situated at the centre of Donegal town, Donegal Castle was fully restored in the late 1990s by the Office of Public Works. The castle consists of a 15th-century rectangular Tower House with a later Jacobean style wing known as the Manor House. / AFP / PAUL FAITH (Photo credit should read PAUL FAITH/AFP/Getty Images)

Britain's Prince Charles, Prince of Wales (C) and his wife Britain's Camilla, Duchess of Cornwall (2R), tour Dongal Castle on May 25, 2016.
Situated at the centre of Donegal town, Donegal Castle was fully restored in the late 1990s by the Office of Public Works. The castle consists of a 15th-century rectangular Tower House with a later Jacobean style wing known as the Manor House. / AFP / PAUL FAITH        (Photo credit should read PAUL FAITH/AFP/Getty Images)