Acts of Union 1800 when repealed in 1962. Before these Acts, Ireland had been in personal union with England since 1541, when the Irish Parliament had passed the Crown of Ireland Act 1542, proclaiming King Henry VIII of England to be King of Ireland. Since the 12th century, the King of England had been technical overlord of the Lordship of Ireland, a papal possession. Both the Kingdoms of Ireland and England later came into personal union with that of Scotland upon the Union of the Crowns in 1603. In 1707, the Kingdom of England and the Kingdom of Scotland were united into a single
Unionism in the United Kingdom single Parliament of Great Britain at Westminster as well as a customs and monetary union. However, England and Scotland remained separate legal jurisdictions. In 1801, the Acts of Union 1800 united the Kingdom of Great Britain with the Kingdom of Ireland, through two similar independent acts of the Parliament of Great Britain and the Parliament of Ireland. This created the United Kingdom of Great Britain and Ireland on a similar basis to how England and Scotland had been united a century earlier. A campaign to repeal the Union in Ireland began immediately. A series of efforts in the late 19th