Question 8: In 1525 Grand Master Albert of Brandenburg-Ansbach
secularized the Order's Prussian territories into the Protestant ________, a vassal of the crown of Poland.
Question 9: More extensive mention of the Old Prussians in historical
sources is in connection with ________, who was sent by
Boleslaw I of the Polans.
Question 10: ________ led to the belief that each
Prussian tribe was named after a tribal leader or his wife, such as
the mythical leader Warmo ruling the Warmians.