FREDERICK I., surnamed Barbarossa (Red-beard), of the house of Swabia, emperor of the HOLY ROMAN EMPIRE (q. v.) from 1152 till 1190; “a magnificent, magnanimous man, the greatest of all the Kaisers”; his reign is the most brilliant in the annals of the empire, and he himself among the most honoured of German heroes; his vast empire he ruled with iron rigour, quelling its rival factions and extending his sovereign rights to Poland, Hungary, Denmark, and Burgundy; the great struggle of his reign, however, was with Pope Alexander III. and the Lombard cities, whose right to independence he acknowledged by the treaty of Constanz (1183); he “died some unknown sudden death” at 70 in the crusade against Saladin and the Moslem power; his lifelong ambition was to secure the independence of the empire, and to subdue the States of Italy to the imperial sway (1123-1190).

FREDERICK II., called the Wonder of the World, grandson of the preceding; he was crowned emperor in 1215, at Aix-la-Chapelle, having driven Otto IV. from the throne; he gave much attention to the consolidating of his Italian possessions, encouraged learning and art, founded the university of Naples, and had the laws carefully codified; in these attempts at harmonising the various elements of his empire he was opposed by the Papal power and the Lombards; in 1228 he gained possession of Jerusalem, of which he crowned himself king; his later years were spent in struggles with the Papal and Lombard powers, and darkened by the treachery of his son Henry and of an intimate friend; he was a man of outstanding intellectual force and learning, but lacked the moral greatness of his grandfather (1194-1250).

FREDERICK III., emperor of Germany, born at Potsdam; bred for the army; rose to command; did signal service at Koeniggratz in 1860, and again in 1870 in the Franco-German War; married the Princess Royal of England; succeeded his father, but fell a victim to a serious throat malady after a reign of only 101 days, June 18 (1831-1888).

FREDERICK V., Electoral Prince Palatine; succeeded to the Palatinate in 1610, and three years later married Elizabeth, daughter of James I. of England; an attempt to head the Protestant union of Germany and his usurpation of the crown of Bohemia brought about his ruin and expulsion from the Palatinate in 1620 by the Spaniards and Bavarians; he took refuge in Holland, but two years later his principality was given to Bavaria by the emperor (1596-1632).

FREDERICK III., of Denmark, succeeded to the throne in 1648; during his reign the arrogance and oppression of the nobles drove the commons, headed by the clergy, to seek redress of the king by proclaiming the constitution a hereditary and absolute monarchy (1609-1670).

FREDERICK V., of Denmark, ascended the throne in 1746; during his reign Denmark made great progress, manufactures were established, commerce extended, while science and the fine arts were liberally patronised (1723-1766).