Albert (March 28 1522-1557), prince of Bayreuth, (Germany), surnamed the Warlike, and also Alcibiades, was a son of Casimir, prince of Bayreuth, and a member of the Franconian branch of the Hohenzollern family.

He was born at Ansbach and having lost his father in 1527 he came under the guardianship of his uncle George, prince of Ansbach, a strong adherent of Protestantism. In 1541 he received Bayreuth as his share of the family lands, and as the chief town of his principality was Kulmbach he is sometimes referred to as the margrave of Brandenburg-Kulmbach.

His restless and turbulent nature marked him out for a military career; and having collected a small band of soldiers, he assisted the emperor Charles V in his war with France in 1543. The Peace of Crepy in September 1544 deprived him of this employment, but he had won a considerable reputation, and when Charles was preparing to attack the Schmalkaldic League, he took pains to win Albert's assistance. Sharing in the attack on the Saxon electorate, Albert was taken prisoner at Rochlitz in March 1547 by John Fredeack, elector of Saxony, but was released as a result of the emperor's victory at the Battle of Mühlberg in the succeeding April.

He then followed the fortunes of his friend Maurice of Saxony , deserted Charles, and joined the league which proposed to overthrow the emperor by an alliance with Henry II of France. He took part in the subsequent campaign, but when the Treaty of Passau was signed in August 1552 he separated himself from his allies and began a crusade of plunder in Franconia. Having extorted a large sum of money from the citizens of Nuremberg, he quarrelled with his supporter, the French king, and offered his services to the emperor. Charles, anxious to secure such a famous fighter, gladly assented to Albert's demands and gave the imperial sanction to his possession of the lands taken from the bishops of Würzburg and Bamberg; and his conspicuous bravery was of great value to the emperor on the retreat from Metz in January 1553.

When Charles left Germany a few weeks later, Albert renewed his depredations in Franconia. These soon became so serious that a league was formed to crush him, and Maurice of Saxony led an army against his former comrade. The rival forces met at Sievershausen on July 9 1553, and after a combat of unusual ferocity Albert was put to flight. Henry II, duke of Brunswick, then took command of the troops of the league, and after Albert had been placed under the imperial ban in December 1553 he was defeated by Duke Henry, and compelled to flee to France. He there entered the service of Henry II of France and had undertaken a campaign to regain his lands when he died at Pforzheim on January 8 1557.

He is defined by Carlyle "a failure of a Fritz," with "features" of a Frederick the Great in him, "but who burnt away his splendid qualities as a mere temporary shine for the able editors, and never came to anything, full of fire, too much of it wildfire, not in the least like an Alcibiades except in the change of fortune he underwent".