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Island county of north‐west Wales, separated from the mainland by the Menai Straits. In 1974 it became the district of Ynys Môn in the county of Gwynedd, but was reconstituted as a county in 1996. Its location, together with the protective barrier of the Snowdonian mountains, made it a traditional centre of resistance to invaders, Roman and Norman. But after conquest by Edward I it was created a county of the principality of Wales in 1284, a status confirmed at the Act of Union of 1536.

Subjects: Religion — British History.

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