The Duke of Prussia adopted the title of king as Frederick I, establishing his status as a monarch whose royal territory lay outside the boundaries of the Holy Roman Empire, with the assent of Emperor Leopold I: Frederick could not be "King of Prussia" because part of Prussia's lands were under the suzerainty of the Crown of the Kingdom of Poland.
In the age of absolutism, most monarchs were obsessed with the desire to emulate Louis XIV of France with his luxurious palace at Versailles.
From 1420, he became Margrave of Brandenburg-Kulmbach.
From 1411 Frederick VI became governor of Brandenburg and later Elector and Margrave of Brandenburg as Frederick I.
In 1218 the burgraviate passed to Frederick's elder son Conrad I, he thereby became the ancestor of the Franconian Hohenzollern branch, which acquired the Electorate of Brandenburg in 1415.
He became primus inter pares among other German sovereigns.The Hohenzollern Castle lies on an 855 meters high mountain called Hohenzollern. As loyal vassals of the Swabian Hohenstaufen dynasty, they were able to significantly enlarge their territory. In about 1185 he married Sophia of Raabs, the daughter of Conrad II, Burgrave of Nuremberg.After the death of Conrad II who left no male heirs, Frederick III was granted Nuremberg as Burgrave Frederick I.In 1701 the title of King in Prussia was granted, without the Duchy of Prussia being elevated to a Kingdom within the Holy Roman Empire.From 1701 onwards the titles of Duke of Prussia and Elector of Brandenburg were always attached to the title of King in Prussia.