James II. She succeeded William III in 1702 and oversaw the Act of Union with Scotland in 1707. This meant that her title changed from Queen of England and Queen of Scotland to Queen of Great Britain. (She was also Queen of Ireland.)
She was a well intentioned woman but was often influenced by her favorites, at first by the Duchess of Marlborough. However, in the main she was guided by Tory and high-church principles and established Queen Anne's Bounty to improve church finances. Although she had no marked ability her reign saw some notable literary output (Swift, Pope, Addison, Steele and Defoe), science (Newton and newtonianism), architecture (Wren, Vanbrugh) and the Duke of Marlborough's victories in war.
Anne's parliament was responsible for passing most of the Penal Laws in Ireland, the majority of which were intended to remove power from the Catholic majority in the country.
Anne was the last British monarch to veto an act of Parliament.