The Prussian Tribut reference article from the English Wikipedia on 24-Jul-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Prussian Tribut

Sponsorship the way you would do it
During the Reformation endemic religious upheavals and wars occurred, and in 1525, the last Grand Master of the Teutonic Knights, Albert of Prussia, a member of a cadet branch of the house of Hohenzollern, resigned his position, became a Protestant and received the title "Duke of Prussia" from Sigismund I King of Poland, Great Duke of Lithuania and imperial duke of Silesia in the act called Prussian Tribut. In a deal partially brokered by Martin Luther (under imperial ban since 1521), Ducal Prussia became the first Protestant state, along the lines of the later religious Peace of Augsburg.