Question
The Declaration of Independence says "A Prince whose character is thus marked by every act which may define a Tyrant, is unfit to be the ruler of a free people."
Who was the prince?
Answer
It was the King of Great Britain and Ireland, George III.
As far as the Continental Congress was concerned, George was no longer its king. Instead, the Declaration of Independence outlined 27 grievances against George and labeled him “a Tyrant […] unfit to be the ruler of a free people.
https://www.nationalgeographic.com/history/article/king-george-iii-american-revolution
He would be the last king of America.