In 1196, Henry VI secured the election as German king, or emperor-elect, for his infant son Frederick. When Henry died (1197), his brother, Philip of Swabia, was unable to hold the German magnates to this election, but in Sicily Constance secured Frederick's investiture as king from Pope Innocent III. Prior to her death (1198) Constance named the pope as Frederick's guardian; as a child, however, he passed from one Sicilian faction to another.
Meanwhile, in Germany, Otto of Brunswick (Otto IV) and Philip of Swabia were elected rival kings. Otto finally prevailed and was crowned emperor (1209) at Rome, but immediately alienated the pope by attempting to reassert imperial control in Italy. His invasion of Apulia (1210) led Innocent to promote Frederick's coronation (1212) at Mainz as German king, even though this meant putting a Hohenstaufen on the imperial throne. After Otto's defeat at Bouvines (1214) by Frederick's French ally King Philip II, Frederick was recrowned (1215) at Aachen and took the Cross (i.e., pledged to lead a Crusade).
Despite his promises to Pope Innocent III that when crowned Holy Roman emperor he would separate Sicily from the empire by establishing a regency there for his infant son Henry, he reversed these arrangements in 1220. Promising Pope Honorius III to start on his crusade, he secured Henry's election as German king, and thus his position as imperial successor, shortly before his own imperial coronation (1220) at Rome. This action seemed to insure the union of Sicily and the empire. Under Frederick, however, no such union was effected; Henry governed, first under a regency, in Germany, and Frederick governed Italy and Sicily, which became the seat of his empire.
After his coronation Frederick returned to Sicily. While in Germany, the success of Frederick's early rule (1212-20) was due largely to his lavishness with imperial lands and rights. In his Sicilian kingdom, which included S Italy, he pursued the reverse of his German policy; he suppressed the barons, transported the Saracens to a colony on the mainland, recovered alienated lands, and began his legislative reforms. In 1224 he founded the university at Naples.
Having married (1225) Yolande, daughter of John of Brienne, he claimed the crown of Jerusalem, but again postponed his departure on crusade. He further offended the pope by reasserting at the Diet of Cremona (1226) the imperial claim to Lombardy. The Lombard League was immediately revived, but open conflict did not break out until 1236. On the insistent demand of the new pope, Gregory IX, Frederick embarked on a crusade (Sept., 1227), but fell ill, turned back, and was excommunicated.
In 1228 he finally embarked. His "crusade," actually a state visit, was a diplomatic victory. At Jaffa he made a treaty by which Jerusalem, Nazareth, and Bethlehem were surrendered to the Christians, with the Mosque of Omar being left to the Muslims. In 1229 he crowned himself king at Jerusalem. The pope denounced the treaty by Frederick, who was still under excommunication, and sent a papal army to invade Frederick's kingdom. Frederick returned in 1229 and signed (1230) the Treaty of San Germano, by which he was temporarily reconciled with the pope.
He then turned to strengthening his Sicilian domains in preparation for the inevitable conflict with the Lombard League. Among his achievements in Sicily were his Liber Augustalis (1231), a new body of laws that were the most constructive of the era. In Germany, Frederick attempted to insure support for his Italian policy by granting the princes practically absolute authority within their territories. This policy led to a conflict with his son Henry, who objected to Frederick's virtual renunciation of his imperial rights in Germany. In 1234 Henry rebelled with the aid of the German towns, but Frederick easily deposed and imprisoned (1235) his son. At the Diet of Mainz (1235), Frederick issued a land peace establishing an imperial court of justice to try all cases except those involving the great vassals. This land peace is one of the monuments of imperial legislation.
In 1236 Frederick began a successful campaign against the Lombard cities, but in Mar., 1239, Pope Gregory IX joined the Lombards and excommunicated the emperor. Frederick issued a circular against the pope and seized most of the Papal States; in May, 1241, he captured a number of prelates en route from Genoa to a general council in Rome, and he was threatening Rome when Gregory died. While emperor and pope were thus at swords' points, Europe was threatened (1241) by a Mongol invasion under Batu Khan. The Mongols withdrew in 1242.
After the election (1243) of Pope Innocent IV, Frederick offered sweeping concessions to the pope and his allies, but the pope fled (1244) to Lyons, deposed Frederick at the Council of Lyons (1245), and gave the emperor's foes the privileges of Crusaders. The election (1246) of an antiking to Conrad IV, Frederick's younger son, plunged Germany into civil war. The war in Italy turned in Frederick's favor in 1250, but in December he died of dysentery.
Frederick II was one of the most arresting figures of the Middle Ages. He called himself "lord of the world"; his contemporaries either praised him as stupor mundi [wonder of the world] or reviled him as anti-Christ. Norman and German in ancestry but essentially a Sicilian, Frederick always felt a stranger in Germany. He spent most of his time in Italy and Sicily, where his legal reforms set up an efficient administration. This system he tried, with some success, to transfer to Germany.
Himself an expert trader engaging in far-flung business affairs, Frederick encouraged commerce and soon expanded it to Spain, Morocco, and Egypt. Agriculture and industry were likewise fostered. Towns, though at first somewhat curbed, enjoyed a more generous treatment in the later years of his reign, and many developed into important trade centers.
Frederick was also a gifted artist and scientist. A poet himself, he was surrounded by Provençal troubadours and German minnesingers. He patronized science and philosophy and interested himself in medicine, mathematics, astronomy, and astrology. His De arte venandi cum avibus, on hawking as well as the anatomy and life of birds, was the first modern ornithology. Frederick's personality was a curious mixture of German-Christian and Byzantine-Muslim influences. Although Christian, he maintained a harem; though he was frequently at odds with the papacy, he ruthlessly persecuted heretics; though sensitive to art and poetry, he could be extremely cruel.
The intense struggle between Frederick and the papacy led to the ruin of the house of Hohenstaufen and severely damaged papal prestige. With his rule the great days of the German empire ended and the rise of states in Italy began. The interregnum (see Holy Roman Empire) ended only with the election (1273) of Rudolf I of Hapsburg.
See biography by T. C. Van Cleve (1972); study by G. Masson (1957, repr. 1973).
Frederick's coarse and tyrannical father despised the prince, who showed a taste for French art and literature and no interest in government and war. At the age of 18 Frederick, who had been repeatedly humiliated and ill-treated, planned to escape to England. He was arrested, imprisoned, and forced to witness the beheading of his friend and accomplice, Lieutenant Katte. Frederick submitted to his father and was released. In 1733, at his father's request, he married Elizabeth of Brunswick-Bevern, but he separated from her shortly afterward and for the rest of his life showed no interest in women.
Prince Frederick spent the next few years at Rheinsberg, where he wrote his Anti-Machiavel, an idealistic refutation of Machiavelli, and began his long correspondence with Voltaire. His period of relative inactivity ended with his accession to the throne in 1740, after which Frederick immediately showed the qualities of leadership and decision that were to characterize his reign.
In the War of the Austrian Succession (1740-48) against Maria Theresa, Frederick invaded Silesia without warning, simultaneously offering his aid to Maria Theresa if she ceded a portion of Silesia to him. A brilliant campaigner, Frederick acted with utter disregard of his allies, notably France, and twice concluded separate peace treaties with Maria Theresa (1742, 1745), both times securing Upper and Lower Silesia for Prussia.
In the Seven Years War (1756-63), possession of Silesia was again in dispute; Maria Theresa wished to recover it, and Frederick faced a strong coalition including Austria, Russia, and France. England was his only strong ally. Victorious at Rossbach and Leuthen (1757), he was routed (1759) at Kunersdorf by the Austro-Russian forces, who in 1760 occupied Berlin. In that dark period, it is said, Frederick was on the verge of suicide. However, the accession (1762) of his admirer, Peter III of Russia, took Russia out of the war and opened Frederick's way to victory.
The Peace of Hubertusburg (1763) left Frederick his previous conquests and made Prussia the foremost military power in Europe. He was brilliantly assisted by his principal generals, Seydlitz, James Keith, Ferdinand of Brunswick, Hans Joachim von Zieten, and others. Frederick is widely recognized as the 18th century's greatest general and military strategist. His tactics were studied and admired by Napoleon Bonaparte and exerted great influence on the art of warfare.
After the peace of 1763 Frederick promoted an alliance with Russia, which had nearly defeated him in the Seven Years War. The establishment of a Russo-Prussian alliance prepared the way for the eventual dismemberment of Poland. By the first partition of Poland (see Poland, partitions of) in 1772, Frederick vastly expanded the limits of Prussia. His rivalry with Austria persisted. He opposed any attempts by Austria to extend its power within the Holy Roman Empire and instigated the War of the Bavarian Succession (1778-79) to prevent Austrian annexation of Bavaria. He also created (1785) the Fürstenbund [league of princes] to check Austrian schemes.
Frederick continued his father's fundamental domestic policies. His first care was the strength and discipline of his army. An "enlightened despot," he instituted important legal and penal reforms, set up trade monopolies to create new industries, forwarded education, and accomplished internal improvements such as drainage projects, roads, and canals. Though he improved the lot of his own serfs, the nobility had more control over their peasants after his reign than before.
Frederick was tolerant in religious matters, personally professing atheism to his intimates. Cold and curt, he relaxed only during his famous midnight suppers at Sans Souci, his residence at Potsdam. There he was surrounded by a group of educated men, mostly French, that included at times Voltaire (who broke with him in 1753 but who later resumed his friendship from a safe distance), d'Alembert, La Mettrie, and Maupertuis.
Frederick's wit was corrosive and icy. He wrote inconsequential poetry and remarkable prose on politics, history, military science, philosophy, law, and literature. Nearly all his writings were in French. He failed to appreciate such men as Lessing and Goethe, who were among his most ardent admirers. A pupil of Quantz, he played the flute creditably, and he composed marches, concertos for the flute, and other pieces. Frederick's personal appearance in his later years—small, sharp-featured, untidy, and snuff-stained—has become part of the legend of "Old Fritz." He was succeeded by his nephew, Frederick William II.
See J. D. E. Preuss, ed., Œuvres de Frédéric le Grand (33 vol., 1846-57). See also biographies by Carlyle and Macaulay, both classics, and the more scholarly studies by G. Ritter (1936, tr. 1968), P. Gaxotte (tr. 1941), G. P. Gooch (1947), L. Reiners (1952, tr. 1960), P. Paret, ed. (1972), W. Hubatsch (1976), and D. Fraser (2002).
(born Jan. 24, 1712, Berlin—died Aug. 17, 1786, Potsdam, near Berlin) King of Prussia (1740–86). The son of Frederick William I, he suffered an unhappy early life, subject to his father's capricious bullying. After trying to escape in 1730, he submitted to his father but continued to pursue intellectual and artistic interests. On his father's death (1740), Frederick became king and asserted his leadership. He seized parts of Silesia during the War of the Austrian Succession, strengthening Prussia considerably. He invaded Saxony in 1756 and marched on into Bohemia. Frederick was almost defeated in the Seven Years' War (1756–63), until his admirer Peter III signed a Russo-Prussian peace treaty that lasted until 1780. The First Partition of Poland in 1772 led to enormous territorial gains for Prussia. Austro-Prussian rivalry led to the War of the Bavarian Succession (1778–79), a diplomatic victory for Frederick, but continued fear of Habsburg ambitions led him to form a league of German states against Joseph II. Under Frederick's leadership Prussia became one of the great states of Europe, with vastly expanded territories and impressive military strength. In addition to modernizing the army, Frederick also espoused the ideas of enlightened despotism and instituted numerous economic, civil, and social reforms.
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