William Sinclair, 1st Earl of Caithness — news, coverage & facts — IJR
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William Sinclair, 1st Earl of Caithness
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William Sinclair (1410–1480), 1st Earl of Caithness (1455–1476), last Earl (Jarl) of Orkney, 2nd Lord Sinclair and 11th Baron of Roslin was a Norwegian and Scottish nobleman and the builder of Rosslyn Chapel, in Midlothian.