Albrecht III was Elector of Brandenburg from 1471 until his death, the third from the House of Hohenzollern. A member of the Order of the Swan, he received the cognomen Achilles because of his knightly qualities and virtues. He also ruled in the Franconian principalities of Ansbach from 1440 and Kulmbach from 1464.

The Principality of Bayreuth or Margraviate of Brandenburg-Bayreuth was an immediate territory of the Holy Roman Empire, ruled by a Franconian branch of the Hohenzollern dynasty. Since Burgrave Frederick VI of Nuremberg was enfeoffed with the Margraviate of Brandenburg in 1415/17, the Hohenzollern princes transferred the margravial title to their Franconian possessions, though the principality never had been a march. Until 1604 they used Plassenburg Castle in Kulmbach as their residence, hence their territory was officially called the Principality of Kulmbach or Margraviate of Brandenburg-Kulmbach until the Empire's dissolution in 1806.