![Prof. Frank McDonough on X: "28 March 1800. The Irish Parliament passed the Act of Union which took effect 1 January 1801. It created the United Kingdom of Great Britain and Ireland. Prof. Frank McDonough on X: "28 March 1800. The Irish Parliament passed the Act of Union which took effect 1 January 1801. It created the United Kingdom of Great Britain and Ireland.](https://pbs.twimg.com/media/ExjHgwhXIAIAqIn.jpg)
Prof. Frank McDonough on X: "28 March 1800. The Irish Parliament passed the Act of Union which took effect 1 January 1801. It created the United Kingdom of Great Britain and Ireland.
![Prof. Frank McDonough on X: "1 January 1801. The Acts of Union (1800), which created the United Kingdom of Great Britain and Ireland, became legally effective. The Union flag is an amalgamation Prof. Frank McDonough on X: "1 January 1801. The Acts of Union (1800), which created the United Kingdom of Great Britain and Ireland, became legally effective. The Union flag is an amalgamation](https://pbs.twimg.com/media/GCvoQyQXYAAU9KR.jpg)
Prof. Frank McDonough on X: "1 January 1801. The Acts of Union (1800), which created the United Kingdom of Great Britain and Ireland, became legally effective. The Union flag is an amalgamation
![The Irish Act of Union: A Study in High Politics 1798-1801: Bicentennial Essays : Kelly, James, Geoghegan, Patrick, Brown, Michael: Amazon.de: Bücher The Irish Act of Union: A Study in High Politics 1798-1801: Bicentennial Essays : Kelly, James, Geoghegan, Patrick, Brown, Michael: Amazon.de: Bücher](https://m.media-amazon.com/images/I/51jbuENY-vL._AC_UF894,1000_QL80_.jpg)
The Irish Act of Union: A Study in High Politics 1798-1801: Bicentennial Essays : Kelly, James, Geoghegan, Patrick, Brown, Michael: Amazon.de: Bücher
![The Irish Act of Union: A Study in High Politics 1798-1801 - Geoghegan, Patrick M.: 9780717128945 - AbeBooks The Irish Act of Union: A Study in High Politics 1798-1801 - Geoghegan, Patrick M.: 9780717128945 - AbeBooks](https://pictures.abebooks.com/isbn/9780717128945-de.jpg)