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The 1800 Act of Union merged the Kingdom of Ireland and the Kingdom of Great Britain (itself a merger of England and Scotland under the Act of Union 1707) to create the United Kingdom of Great Britain and Ireland on 1 January 1801.
The final passage of the Act in the Irish Parliament was achieved with substantial majorities, and was marked by mass bribery of Irish MPs by the British government, including the granting of titles and lands.
Known as the "Union Flag" (or Union Jack), it combines the flags of England and Scotland with St Patrick's Cross, representing Ireland.
Introduction; Act of Union of 1536; Act of Union of 1707; Act of Union of 1800; Act of Union of 1840
The Act of Union passed in 1536, during the reign of King Henry VIII, the second English monarch descended from the Welsh House of Tudor.
The Act of Union, which was passed in 1800 and went into effect on January 1, 1801, joined the Kingdom of Great Britain and all of Ireland into the United Kingdom of Great Britain and Ireland.