Frederick III, Holy Roman Emperor

Frederick was born on September 21, 1415 in Innsbruck, the eldest son of Duke Ernest of Inner Austria, called Ernest the Iron, and his second wife Cymburgis of Masovia, a Polish princess famed for her physical strength ^[1]. His father belonged to the Leopoldian line of the House of Habsburg, the branch that governed Styria, Carinthia, and Carniola after the family partitioned its lands in 1379. The prominent lower jaw that later generations would call the Habsburg lip is often traced, in family tradition, to Cymburgis ^[2].

Ernest died in 1424, when Frederick was eight. The boy and his younger brother Albert passed into the guardianship of their uncle, Duke Frederick IV of Tyrol, an arrangement the young heir resented and eventually contested ^[1]. In 1435 he took full control of the Inner Austrian duchies. Two years later he traveled to the Holy Land on pilgrimage, a journey that earned him a knighthood at the Holy Sepulchre and considerable prestige at home ^[3].

As a young ruler Frederick adopted the vowel device A.E.I.O.U., which he inscribed on buildings, books, and tableware. He never fixed its meaning in writing during his lifetime, though later interpretations include the Latin phrase Austriae est imperandum orbi universo, that Austria is destined to rule the whole world ^[2]. Whatever he intended, the motto captured an ambition that his cautious personality rarely displayed openly.

The death of King Albert II in October 1439 left the German throne vacant and the Habsburg family without an adult male in its senior Albertine line, since Albert's son Ladislaus was born only after his father died ^[1]. The prince-electors turned to Frederick, the most senior Habsburg available, and chose him as King of the Romans on February 2, 1440. He was crowned at Aachen in 1442 ^[3].

Frederick also became guardian of the infant Ladislaus Posthumous, heir to Austria, Hungary, and Bohemia. His refusal to surrender the boy to the Austrian and Hungarian estates provoked years of conflict, including a siege of Frederick's residence at Wiener Neustadt in 1452 that forced him to hand Ladislaus over ^[4]. These disputes fixed his reputation as a ruler who would concede only when compelled, and only after exhausting every delay available to him.

His relations with the church proved more productive. Working with his secretary Enea Silvio Piccolomini, the future Pope Pius II, Frederick negotiated the Concordat of Vienna in 1448, which settled the relationship between the papacy and the German church and remained in force until the empire's dissolution in 1806 ^[5]. The agreement ended the German neutrality that had prevailed during the crisis of the Council of Basel and earned Frederick papal goodwill that he soon converted into something grander.

In March 1452 Frederick traveled to Italy for two ceremonies that defined his reign. In Rome on March 16 he married Eleanor of Portugal, daughter of King Duarte, whom he had never met before her sea voyage to Italy. Three days later, on March 19, Pope Nicholas V crowned him Holy Roman Emperor in St. Peter's Basilica ^[3]. No emperor after him would ever again be crowned by a pope in Rome, which makes the event a genuine turning point among Frederick III, Holy Roman Emperor facts ^[1].

The splendor in Rome contrasted sharply with his weakness at home. Frederick rarely convened the imperial diet in person, seldom left his Austrian lands in later decades, and watched imperial authority in Germany erode while princes and cities managed their own affairs ^[4]. Critics called him the arch sleepyhead of the empire. The label was unfair in one respect: his inactivity was frequently a deliberate tactic, waiting for opponents to die, quarrel, or run out of money ^[2].

Frederick did use the imperial office where it cost little and yielded much. In 1453 he confirmed the Privilegium Maius, a set of forged fourteenth century charters that elevated the Austrian rulers to the invented rank of archduke and granted them sweeping autonomy ^[5]. By validating documents that his ancestor Rudolf IV had fabricated, Frederick raised his own house above the other German princes at the stroke of a pen.

The middle decades of the reign tested Frederick's capacity for endurance. His brother Albert VI fought him openly for control of the Austrian lands, and in 1462 besieged Frederick, his wife, and his small son inside the Hofburg in Vienna while the city's population sided with the besiegers ^[4]. Rescue came from the Bohemian king George of Podebrady. Albert's sudden death in 1463 resolved the feud in Frederick's favor, a pattern of survival by outliving that repeated throughout his life ^[1].

A far more dangerous enemy arose in Matthias Corvinus, the formidable king of Hungary. Their rivalry over the Bohemian and Hungarian successions turned into open war, and Matthias conquered Lower Austria, taking Vienna itself in 1485 and Wiener Neustadt in 1487 ^[6]. Frederick, driven from his capital, wandered between Linz and other loyal towns. Once again mortality served him better than armies: Matthias died in 1490 without a legitimate heir, and Frederick's son Maximilian swiftly recovered the lost territories ^[6].

The Ottoman advance shadowed these same years. Turkish raiding parties struck deep into Styria, Carinthia, and Carniola from the 1470s onward, burning villages and carrying off captives, while Frederick lacked the money and the unified command to mount an effective defense ^[4]. The failure was real, but it also pushed the estates of Inner Austria toward the defensive institutions that his successors would later organize.

Frederick's greatest achievement required no battle. Charles the Bold, duke of Burgundy and the richest prince in western Europe, sought a royal crown, and Frederick held the only authority that could grant one. The two rulers met at Trier in 1473 to discuss a bargain: a crown for Charles in exchange for the marriage of Charles's only child, Mary of Burgundy, to Frederick's son Maximilian ^[5]. Frederick, characteristically, departed abruptly without concluding the deal, unwilling to pay the price demanded.

Events then broke his way. Charles the Bold was killed at the Battle of Nancy in January 1477, leaving Mary as heiress to the Netherlands, Luxembourg, and the Burgundian lands. With the French king moving to seize the inheritance, Mary married Maximilian in August 1477 ^[1]. The union delivered the wealthiest territories in Europe to the Habsburgs and set the family on the path toward the vast empire of Charles V. Among all Frederick III, Holy Roman Emperor achievements, this dynastic coup mattered most for the centuries that followed ^[6].

Frederick secured the succession within the empire as well. In 1486, while he still lived, the electors chose Maximilian as King of the Romans, guaranteeing a smooth transfer of the imperial title ^[3]. Father and son governed jointly in Frederick's final years, the old emperor retaining the title while the energetic Maximilian handled war and diplomacy.

Frederick and Eleanor of Portugal had five children, of whom two survived to adulthood: Maximilian, born in 1459, and Kunigunde, born in 1465 ^[3]. Eleanor died in 1467, and Frederick never remarried. Observers described the marriage as distant in temperament, the lively Portuguese princess paired with a husband of legendary reserve, though the surviving children secured the dynasty's future ^[2].

The emperor's habits attracted comment across Europe. He moved slowly, spoke little, and trusted few. He took genuine interest in alchemy, astrology, gardening, and precious stones, and he collected jewels with a connoisseur's care ^[2]. As territorial ruler he was also a mint lord, controlling coinage in his Austrian lands at a time when silver from Tyrolean and Styrian mines was gaining importance in the region's economy ^[4].

His piety was conventional but persistent. He founded religious houses, pressed Rome for the canonization of margrave Leopold III of Austria, and obtained a bishopric for Vienna in 1469, giving his residence city an ecclesiastical rank it had long lacked ^[5]. In 1463, after decades of dispute, the death of his brother left him sole ruler of the reunited Austrian inheritance, which he governed until transferring effective power to Maximilian late in life ^[1].

Frederick spent his final years mainly in Linz, his capital in exile after the Hungarian occupation of Vienna. In 1493 physicians amputated his left leg above the knee because of a circulatory ailment that had turned gangrenous; the operation, performed without effective anesthesia on a man of seventy seven, briefly succeeded ^[3]. He died in Linz on August 19, 1493. His body was later placed in a monumental raised tomb of red marble in St. Stephen's Cathedral in Vienna, carved over decades by Niclas Gerhaert van Leyden and his successors, one of the finest sepulchral monuments of the late Middle Ages ^[5].

His fifty three years as German king and emperor remain the longest reign in the history of the medieval empire ^[1]. Judgments of that reign have shifted. Nineteenth century historians dismissed him as an idle failure who let Germany drift. More recent scholarship treats him as a tenacious dynast whose narrow, stubborn defense of Habsburg rights accomplished more than the flamboyant campaigns of his rivals ^[4].

Any balanced Frederick III, Holy Roman Emperor biography ends with the dynasty. From his reign until 1806, with a single brief interruption in the eighteenth century, every Holy Roman Emperor was a Habsburg ^[1]. The Burgundian marriage, the archducal title, the concordat with Rome, and the orderly succession to Maximilian all originated with the slow man from Innsbruck who simply refused to lose. His vowel motto outlived him on buildings across Austria, a riddle left by a ruler who preferred to keep his intentions to himself ^[2].