"The Habsburg Monarchy (or Habsburg Empire) is an unofficial appellation amongst historians for the countries and provinces which were ruled by the junior Austrian branch of the House of Habsburg (1278?1780), and then by the successor House of Habsburg-Lorraine (from 1780), between 1526 and 1804. The "Habsburg Monarchy / Habsburg Empire" term was born only posteriorly in the early 19th century, which referred to the Habsburg dominions between the 1526 - 1804 period. The Imperial capital was Vienna, except from 1583 to 1611, when it was moved to Prague. From 1804 to 1867 the Habsburgs ruled the Austrian Empire and from 1867 to 1918 Austria-Hungary."--Wikipedia.