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In page History of the Isle of Man:

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Little is known about the conqueror, Godred Crovan. According to the Chronicon Manniae he subdued Dublin, and a great part of Leinster, and held the Scots in such subjection that supposedly no one who set out to build a vessel dared to insert more than three bolts.[citation needed] The memory of such a ruler would be likely to survive in tradition, and it seems probable therefore that he is the person commemorated in Manx legend under the name of King Gorse or Orry.[1] He created the Kingdom of Mann and the Isles in around 1079 including the south-western islands of Scotland until 1164, when two separate kingdoms were formed from it. In 1154, later known as the Diocese of Sodor and Man, was formed by the Catholic Church.[citation needed][2]