Donegal (Irish, Dún na nGall), translates as Fort of the Foreigner possibly coming from a Viking fortress in the area destroyed in 1159. However, due to hundreds of years of development, no archaeological evidence of this early fortress has been found. Red Hugh O?Donnell (Red Hugh I), wealthy chief of the O?Donnell clan, built the castle in 1474. At the same time, he and his wife Nuala built a Franciscan monastery further down the river. A local legend[citation needed ] tells of a tunnel connecting the two but no evidence for this has been found. The castle was regarded as one of the finest Gaelic castles in Ireland. This was indicated by a report by the visiting English Viceroy, the Lord Deputy of Ireland, Sir Henry Sidney, in 1566, in a letter to William Cecil (created The 1st Baron Burghley in 1571), the Lord High Treasurer, describing it as "the largest and strongest fortress in all Ireland", adding:[1]
