Tossup

In 1079, this island’s Battle of Sky Hill led to it being conquered at the third attempt by Godred Crovan, who made it the southernmost part of an island kingdom. (10[1])From the 10th century, Norse rulers used this island’s Castle Rushen, which lends its (10[1])name to its former capital. The House of Keys is part of an institution on this island that, like Iceland’s Althing, (10[1])is sometimes called the oldest extant (-5[1])parliament. The logo of this island’s Tynwald legislature (10[1])features (10[1])the triskelion, (10[1])a symbol made of three legs. (10[3])Both Castletown (10[3])and Douglas have served as capital of this island. For 10 points, name this island between Northern Ireland and Cumbria in the Irish Sea. ■END■

ANSWER: Isle of Man [or Ellan Vannin or Mannin]
<Briticisers, European History>
= Average correct buzz position

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