History of the English monarchy in the context of "Petty kingdom"

The Parliament of England was the legislature of the Kingdom of England from the 13th century until 1707 when it was replaced by the Parliament of Great Britain. Parliament evolved from the great council of bishops and peers that advised the English monarch. Great councils were first called Parliaments during the reign of Henry III (r. 1216–1272). By this time, the king required Parliament's consent to levy taxation.

Originally a unicameral body, a bicameral Parliament emerged when its membership was divided into the House of Lords and House of Commons, which included knights of the shire and burgesses. During Henry IV's reign, the role of Parliament expanded beyond the determination of taxation policy to include the right to petition, which essentially enabled English citizens to petition the body to address complaints in their local towns and counties. By this time, citizens were given the power to vote to elect their representatives—the burgesses—to the House of Commons.

In the Kingdom of England, the Magnum Concilium (Latin for "Great Council") was an assembly historically convened at certain times of the year when the English nobles and church leaders outside the Curia regis were summoned to discuss the affairs of the country with the king. In the 13th century, the Great Council was superseded by the Parliament of England, which had developed out of the Council. The Great Council was last summoned by Charles I in 1640.

Prince of Wales is a title traditionally given to the male heir apparent to the English, and later, the British throne. The title originated with the Welsh rulers of Gwynedd who, from the late 12th century, used it (albeit inconsistently) to assert their supremacy over the other Welsh rulers. However, to mark the finalisation of his conquest of Wales, in 1301, Edward I of England invested his son Edward of Caernarfon with the title, thereby beginning the tradition of giving the title to the heir apparent when he was the monarch's son or grandson. The title was later claimed by the leader of a Welsh rebellion, Owain Glyndŵr, from 1400 until 1415.

The Act of Accord (39 Hen. 6) was an act of the Parliament of England. It was passed into law on 25 October 1460 during a period of intense political division and partisanship at the top of government. Earlier that month, Richard, Duke of York had entered the Council Chamber—in the presence of several lords—and laid his hand on the empty throne, claiming the crown of England. His grounds were that he and King Henry VI were both direct descendants of Edward III, but York possessed two claims, through both the male and female lines, and Henry's was through only one. Following discussions between royal justices, York and Parliament, the House of Lords decided that Henry was to retain the crown for life, but York and his heirs were to succeed him. This automatically removed Henry's son, Edward, Prince of Wales, from the succession. Henry agreed to the compromise, which became the Act of Accord.

Political partisanship had already erupted into civil war the year before and, far from lowering political pressure, the act split the nobility further. Although Henry had publicly supported the act, Queen Margaret of Anjou refused to accept the disinheritance of their son. In this, she was joined by the majority of the English nobility, who also opposed York. King Henry, nominally the head of state, was still in London, which was controlled by the Yorkist government. Margaret, on the other hand, was in the north with her son, raising an army. This began the systematic destruction of York's and the Nevilles' Yorkshire estates. York led an army to challenge her but was killed at the Battle of Wakefield on 30 December. The Lancastrians, in turn, were defeated three months later at the Battle of Towton by York's son, who was crowned King Edward IV on 28 June 1461.

The Provisions of Oxford (Latin: Provisiones Oxonie or Oxoniae) were constitutional reforms to the government of late medieval England adopted during the Oxford Parliament of 1258 to resolve a dispute between Henry III of England and his barons. The reforms were designed to ensure the king adhered to the rule of law and governed according to the advice of his barons. A council of fifteen barons was chosen to advise and control the king and supervise his ministers. Parliament was to meet regularly three times a year.

Like the earlier Magna Carta, the Provisions of Oxford demonstrated the ability of the barons to press their concerns in opposition to the English monarchy. Henry's failure to abide by the reforms sparked the Second Barons' War, which ended with Henry's victory and the restoration of royal authority. The Provisions of Oxford were annulled in 1266 by the Dictum of Kenilworth.

The government of the Kingdom of England in the Middle Ages was a monarchy based on the principles of feudalism. The king possessed ultimate executive, legislative, and judicial power. However, some limits to the king's authority had been imposed by the 13th century. Magna Carta established the principle that taxes could not be levied without common consent, and Parliament was able to assert its power over taxation throughout this period.

For information on English government before 1216, see Government in Norman and Angevin England.