As which number Elector of Brandenburg did Frederick I serve?
Frederick IV
Frederick II
Frederick III
Frederick I
Answer
As the third Elector of Brandenburg from the House of Hohenzollern, Frederick I held the title from 1415 until his death in 1440. He succeeded his father, Frederick I, who himself was the first Hohenzollern to be awarded the electoral title in 1415.
The Majestic Monarch: Testing Your Knowledge on Frederick I of Prussia!