Who was the king of the Franks and Lombards, and later crowned as the Holy Roman Emperor?

What was the system in which land was granted by a lord to a vassal in exchange for their service and loyalty called?

What is the process of changing one's religious beliefs to another called?

What was the religious belief system that worshipped multiple gods and goddesses called?

What is a serf?

What is the process of changing one's religious beliefs called?

What was the primary duty of a vassal?

Who was known as 'The Father of Europe'?

What is a fief in medieval society?