George I (1660 - 1727). George I was King of Great Britain and Ireland from 1 August 1714 and ruler of the Duchy and Electorate of Brunswick-Lüneburg in the Holy Roman Empire from 23 January 1698 until his death in 1727. He was the first British monarch of the House of Hanover. Born in Hanover to its Elector Ernest Augustus and Electress Sophia, George inherited the titles and lands of the Duchy of Brunswick-Lüneburg from his father and uncles. A succession of European wars expanded his German domains during his lifetime; he was ratified as prince-elector of Hanover in 1708. After the deaths in 1714 of his mother and his second cousin Anne, Queen of Great Britain, George ascended the British throne as Anne's closest living Protestant relative under the Act of Settlement 1701. Jacobites attempted, but failed, to depose George and replace him with James Francis Edward Stuart, Anne's Catholic half-brother. During George's reign, the powers of the monarchy diminished and Britain began a transition to the modern system of cabinet government led by a prime minister. Towards the end of his reign, actual political power was held by Robert Walpole, now recognised as Britain's first de facto prime minister. George died of a stroke on a trip to his native Hanover, where he was buried. He was the last British monarch to be buried outside the United Kingdom. George was born on 28 May 1660 in the city of Hanover in the Duchy of Brunswick-Lüneburg in the Holy Roman Empire. He was the eldest son of Ernest Augustus, Duke of Brunswick-Lüneburg, and his wife, Sophia of the Palatinate. Sophia was the granddaughter of King James I of England through her mother, Elizabeth of Bohemia. For the first year of his life, George was the only heir to the German territories of his father and three childless uncles. George's brother, Frederick Augustus, was born in 1661, and the two boys were brought up together. Their mother was absent for almost a year during a long convalescent holiday in Italy, but corresponded regularly with her sons' governess and took a great interest in their upbringing, even more so upon her return. Sophia bore Ernest Augustus another four sons and a daughter. In her letters, Sophia describes George as a responsible, conscientious child who set an example to his younger brothers and sisters. By 1675 George's eldest uncle had died without issue, but his remaining two uncles had married, putting George's inheritance in jeopardy as his uncles' estates might pass to their own sons, should they have had any, instead of to George. George's father took him hunting and riding, and introduced him to military matters; mindful of his uncertain future, Ernest Augustus took the fifteen-year-old George on campaign in the Franco-Dutch War with the deliberate purpose of testing and training his son in battle. In 1679 another uncle died unexpectedly without sons, and Ernest Augustus became reigning Duke of Calenberg-Göttingen, with his capital at Hanover. George's surviving uncle, George William of Celle, had married his mistress in order to legitimise his only daughter, Sophia Dorothea, but looked unlikely to have any further children. Under Salic law, where inheritance of territory was restricted to the male line, the succession of George and his brothers to the territories of their father and uncle now seemed secure. In 1682, the family agreed to adopt the principle of primogeniture, meaning George would inherit all the territory and not have to share it with his brothers. The same year, George married his first cousin, Sophia Dorothea of Celle, thereby securing additional incomes that would have been outside Salic laws. The marriage of state was arranged primarily as it ensured a healthy annual income and assisted the eventual unification of Hanover and Celle. His mother at first opposed the marriage because she looked down on Sophia Dorothea's mother, Eleonore, and because she was concerned by Sophia Dorothea's legitimated status. She was eventually won over by the advantages inherent in the marriage. In 1683 George and his brother Frederick Augustus served in the Great Turkish War at the Battle of Vienna, and Sophia Dorothea bore George a son, George Augustus. The following year, Frederick Augustus was informed of the adoption of primogeniture, meaning he would no longer receive part of his father's territory as he had expected. This led to a breach between Frederick Augustus and his father, and between the brothers, that lasted until his death in battle in 1690. With the imminent formation of a single Hanoverian state, and the Hanoverians' continuing contributions to the Empire's wars, Ernest Augustus was made an Elector of the Holy Roman Empire in 1692.