Christina (Swedish: Kristina Augusta; 18 December [O.S. 8 December] 1626 19 April 1689), later known as Christina Alexandra and sometimes Countess Dohna, was Queen regnant of Sweden from 1632 to 1654. She was the only surviving legitimate child of King Gustavus Adolphus of Sweden and his wife Maria Eleonora of Brandenburg. As the heiress presumptive, at the age of six she succeeded her father on the throne of Sweden upon his death at the Battle of Lützen in the Thirty Years' War. After converting to Catholicism and abdicating her throne, she spent her latter years in France and Rome, where she was buried in St. Peter's Basilica.