House of Habsburg

The House of Habsburg (/ˈhæpsbɜːrɡ/; German: Haus Habsburg, lit. 'House of the Hawk's hill' [haʊs ˈhaːbsbʊrɡ] ^ⓘ), also known as the House of Austria, was one of the most powerful dynasties in the history of Europe and Western civilization. They were best known for ruling vast realms throughout Europe during the Middle Ages and early modern period, including the Holy Roman Empire and Spain.

The house takes its name from Habsburg Castle, a fortress built in the 1020s in present-day Switzerland by Radbot of Klettgau, who named his fortress Habsburg. His grandson Otto II was the first to take the fortress name as his own, adding "Count of Habsburg" to his title. In 1273, Count Radbot's seventh-generation descendant, Rudolph, was elected King of the Romans. Taking advantage of the extinction of the Babenbergs and of his victory over Ottokar II of Bohemia at the Battle on the Marchfeld in 1278, he appointed his sons as Dukes of Austria and moved the family's power base to Vienna, where the Habsburg dynasty gained the name of "House of Austria" and ruled until 1918.

The throne of the Holy Roman Empire was continuously occupied by the Habsburgs from 1440 until their extinction in the male line in 1740, and, as the Habsburg-Lorraines from 1765 until its dissolution in 1806. This resulted from a combination of factors, chief among them Napoleon’s military victories in Germany. The empire’s authority had steadily weakened, while political fragmentation among the German states further eroded central control. Economic strains and intensifying regional rivalries compounded these challenges, ultimately destabilizing the Holy Roman Empire. The house also produced kings of Bohemia, Hungary, Croatia, Slavonia, Dalmatia, Spain, Portugal, Sicily, Lombardy-Venetia and Galicia-Lodomeria, with their respective colonies; rulers of several principalities in the Low Countries and Italy; numerous prince-bishoprics in the Holy Roman Empire, and in the 19th century, emperors of Austria and of Austria-Hungary, as well as one emperor of Mexico. The family split several times into parallel branches, most consequentially in the mid-16th century between its Spanish and German-Austrian branches following the abdication of Emperor Charles V in 1556. Although they ruled distinct territories, the different branches nevertheless maintained close relations and frequently intermarried.

Members of the Habsburg family oversee the Austrian branch of the Order of the Golden Fleece, the Order of the Starry Cross and the Imperial and Royal Order of Saint George. The current head of the family is Karl von Habsburg.

The origins of Habsburg Castle's name are uncertain. There is disagreement on whether the name is derived from the High German Habichtsburg (hawk castle), or from the Middle High German word hab/hap meaning literally ford, as there is a river with a ford nearby. The first documented use of the name by the dynasty itself has been traced to the year 1108.

The Habsburg name was not continuously used by the family members, since they often emphasized their more prestigious princely titles. The dynasty was thus long known as the "House of Austria". Complementary, in some circumstances the family members were identified by their place of birth. Charles V was known in his youth after his birthplace as Charles of Ghent. When he became king of Spain he was known as Charles of Spain, and after he was elected emperor, as Charles V (in French, Charles Quint).

In Spain, the dynasty was known as the Casa de Austria, including illegitimate sons such as John of Austria and John Joseph of Austria. The arms displayed in their simplest form were those of Austria, which the Habsburgs had made their own, at times impaled with the arms of the Duchy of Burgundy (ancient).

After Maria Theresa married Duke Francis Stephen of Lorraine, the idea of "Habsburg" as associated with ancestral Austrian rulership was used to show that the old dynasty continued as did all its inherited rights. Some younger sons who had no prospects of the throne were given the personal title of "count of Habsburg".