Gwynedd following the Treaty of Aberconwy in 1277.
<a href="https://en.wikipedia.org/wiki/User:James_Frankcom" class="extiw" title="w:User:James Frankcom">James Frankcom</a> (<a href="https://en.wikipedia.org/wiki/User_talk:James_Frankcom" class="extiw" title="w:User talk:James Frankcom">talk</a>)
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<span class="int-own-work" lang="en">Own work</span>