| http://www.w3.org/ns/prov#value | - In 812 the Vikings sailed up the Shannon and pillaged the city, burned the monastery of Mungret but were forced to flee when the Irish attacked and killed many of their number.[12] The Normans redesigned the city in the 12th century and added much of the most notable architecture, such as King John's Castle and St Mary's Cathedral.[13]
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