However, the heiress of the last Austrian Habsburg (Maria Theresa) had married Francis Stephan, Duke of Lorraine, (both of them were great-grandchildren of Habsburg Emperor Ferdinand III, but from different empresses) and their descendants carried on the Habsburg tradition from Vienna under the dynastic name Habsburg-Lorraine.
Maria Theresa of Austria, Habsburg heiress and wife of emperor Francis I Stephen, reigned as Archduchess of Austria and Queen of Hungary and Bohemia 1740 - 1780.
Brewer-Ward, Daniel A. The House of Habsburg: A Genealogy of the Descendants of Empress Maria Theresia.
Habsburg (sometimes spelled Hapsburg, but never so in official use) was one of the major ruling houses of Europe.
After the marriage of Maximilian I with Mary, heiress of Burgundy (the Low Countries) and the marriage of his son Philipp the Handsome with Juana, heiress of Spain and its newly-founded empire, Charles V inherited an empire where "the sun does not set".
NB: Maria Theresa of Austria, Habsburg heiress and wife of emperor Francis I Stephen, reigned as Archduchess of Austria and Queen of Hungary and Bohemia 1740 - 1780