The House of Hanover (the Hanoverians) is a deposed German royal dynasty which has ruled the Duchy of Brunswick-Lüneburg (German: Braunschweig-Lüneburg), the Kingdom of Hanover, the Kingdom of Great Britain, the Kingdom of Ireland and the United Kingdom of Great Britain and Ireland. It succeeded the House of Stuart as monarchs of Great Britain and Ireland in 1714 and held that office until the death of Victoria in 1901. They are sometimes referred to as the House of Brunswick and Lüneburg, Hanover line. The House of Hanover is a younger branch of the House of Welf, which in turn is the senior branch of the House of Este.

Queen Victoria was the granddaughter of George III, and was an ancestor of most major European royal houses. She arranged marriages for her children and grandchildren across the continent, tying Europe together; this earned her the nickname "the grandmother of Europe". She was the last British monarch of the House of Hanover; her son King Edward VII belonged to the House of Saxe-Coburg and Gotha, the line of his father, Prince Albert. Under semi-Salic law, Victoria could not inherit the German kingdom and duchies unless the entire male line became extinct; those possessions passed to the next eligible male heir, her uncle Ernest Augustus I of Hanover, the Duke of Cumberland and Teviotdale—the fifth son of George III.

Queen Victoria (Alexandrina Victoria; 24 May 1819 – 22 January 1901) was the monarch of the United Kingdom of Great Britain and Ireland from 20 June 1837 until her death. From 1 May 1876, she used the additional title of Empress of India.

Victoria was the daughter of Prince Edward, Duke of Kent and Strathearn, the fourth son of King George III. Both the Duke of Kent and the King died in 1820, and Victoria was raised under close supervision by her German-born mother Princess Victoria of Saxe-Coburg-Saalfeld. She inherited the throne at the age of 18, after her father's three elder brothers had all died without surviving legitimate issue. The United Kingdom was already an established constitutional monarchy, in which the Sovereign held relatively few direct political powers. Privately, she attempted to influence government policy and ministerial appointments. Publicly, she became a national icon, and was identified with strict standards of personal morality.

She married her first cousin, Prince Albert of Saxe-Coburg and Gotha, in 1840. Their nine children and 26 of their 34 grandchildren who survived childhood married into royal and noble families across the continent, tying them together and earning her the nickname "the grandmother of Europe". After Albert's death in 1861, Victoria plunged into deep mourning and avoided public appearances. As a result of her seclusion, republicanism temporarily gained strength, but in the latter half of her reign, her popularity recovered. Her Golden and Diamond Jubilees were times of public celebration.