The British monarchy traces its origins from the kings of the Angles and the early Scottish kings. By the year 1000, the kingdoms of England and Scotland had resolved from the petty kingdoms of early medieval Britain. The last Anglo-Saxon monarch (Harold II) was defeated and killed in the Norman invasion of 1066 and the English monarchy passed to the Norman conquerors. In the thirteenth century, the principality of Wales was absorbed by England, and Magna Carta began the process of reducing the political powers of the monarch.
From 1603, when the Scottish king James VI inherited the English throne as James I, both kingdoms were ruled by a single monarch. From 1649 to 1660, the tradition of monarchy was broken by the republican Commonwealth of England that followed the War of the Three Kingdoms. In 1707, the kingdoms of England and Scotland were merged to create the Kingdom of Great Britain and, in 1801, the Kingdom of Ireland joined to create the United Kingdom of Great Britain and Ireland. The British monarch became nominal head of the vast British Empire, which covered a quarter of the world[1] at its greatest extent in 1921.
In 1922, two thirds of Ireland seceded from the Union as the Irish Free State, but in law the monarch remained sovereign there until 1949. In