Henry Benedict Stuart, Italian cardinal, pretender to the British throne and last member of the House of Stuart (born 1725)

Henry Benedict Thomas Edward Maria Clement Francis Xavier Stuart, Cardinal Duke of York was a Roman Catholic cardinal, and was the third and final Jacobite heir to publicly claim the thrones of Great Britain and Ireland, as the younger grandson of King James II of England. One of the longest-serving cardinals in history, Henry spent his whole life in the Papal States and became the dean of the College of Cardinals and cardinal-bishop of Ostia and Velletri. Unlike his father James Francis Edward Stuart and elder brother Charles Edward Stuart, Henry made no effort to seize the thrones. After Charles's death in 1788, Henry became known by Jacobites as Henry IX and I, but the Papacy did not recognise Henry as the lawful ruler of Great Britain and Ireland and instead referred to him as the "Cardinal Duke of York". He was most widely known as the Duke of York, a title in the Jacobite peerage granted to him by his father.

The Jacobite succession is the line through which Jacobites believed that the crowns of England, Scotland, and Ireland should have descended, applying male preference primogeniture, since the deposition of James II and VII in 1688 and his death in 1701. It is in opposition to the legal line of succession to the British throne since that time.

The House of Stuart, originally spelled Stewart, also known as the Stuart dynasty, was a royal house of Scotland, England, Ireland and later Great Britain. The family name comes from the office of High Steward of Scotland, which had been held by the family progenitor Walter fitz Alan. The name Stewart and variations had become established as a family name by the time of his grandson Walter Stewart. The first monarch of the Stewart line was Robert II, whose male-line descendants were kings and queens in Scotland from 1371, and of England, Ireland and Great Britain from 1603, until 1714. Mary, Queen of Scots, was brought up in France where she adopted the French spelling of the name Stuart.