Maximilian I, Holy Roman Emperor
Overview
 
Maximilian I the son of Frederick III, Holy Roman Emperor
Frederick III, Holy Roman Emperor
Frederick the Peaceful KG was Duke of Austria as Frederick V from 1424, the successor of Albert II as German King as Frederick IV from 1440, and Holy Roman Emperor as Frederick III from 1452...

 and Eleanor of Portugal, was King of the Romans
King of the Romans
King of the Romans was the title used by the ruler of the Holy Roman Empire following his election to the office by the princes of the Kingdom of Germany...

  (also known as King of the Germans) from 1486 and Holy Roman Emperor
Holy Roman Emperor
The Holy Roman Emperor is a term used by historians to denote a medieval ruler who, as German King, had also received the title of "Emperor of the Romans" from the Pope...

 from 1493 until his death, though he was never in fact crowned by the Pope, the journey to Rome always being too risky. He had ruled jointly with his father for the last ten years of his father's reign, from circa 1483. He expanded the influence of the House of Habsburg through war and his marriage in 1477 to Mary of Burgundy
Mary of Burgundy
Mary of Burgundy ruled the Burgundian territories in Low Countries and was suo jure Duchess of Burgundy from 1477 until her death...

, the heiress to the Duchy of Burgundy
Duchy of Burgundy
The Duchy of Burgundy , was heir to an ancient and prestigious reputation and a large division of the lands of the Second Kingdom of Burgundy and in its own right was one of the geographically larger ducal territories in the emergence of Early Modern Europe from Medieval Europe.Even in that...

, but he also lost the Austrian territories in today's Switzerland to the Swiss Confederacy.

By marrying his son Philip the Handsome
Philip I of Castile
Philip I , known as Philip the Handsome or the Fair, was the first Habsburg King of Castile...

 to the future Queen Joanna of Castile
Joanna of Castile
Joanna , nicknamed Joanna the Mad , was the first queen regnant to reign over both the Crown of Castile and the Crown of Aragon , a union which evolved into modern Spain...

 in 1498, Maximilian established the Habsburg dynasty in Spain
Habsburg Spain
Habsburg Spain refers to the history of Spain over the 16th and 17th centuries , when Spain was ruled by the major branch of the Habsburg dynasty...

 and allowed his grandson Charles
Charles V, Holy Roman Emperor
Charles V was ruler of the Holy Roman Empire from 1519 and, as Charles I, of the Spanish Empire from 1516 until his voluntary retirement and abdication in favor of his younger brother Ferdinand I and his son Philip II in 1556.As...

 to hold the throne of both León-Castile
Crown of Castile
The Crown of Castile was a medieval and modern state in the Iberian Peninsula that formed in 1230 as a result of the third and definitive union of the crowns and parliaments of the kingdoms of Castile and León upon the accession of the then King Ferdinand III of Castile to the vacant Leonese throne...

 and Aragon
Kingdom of Aragon
The Kingdom of Aragon was a medieval and early modern kingdom in the Iberian Peninsula, corresponding to the modern-day autonomous community of Aragon, in Spain...

, thus making him the first de jure
De jure
De jure is an expression that means "concerning law", as contrasted with de facto, which means "concerning fact".De jure = 'Legally', De facto = 'In fact'....

King of Spain.
 
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