Trivia: What founder signed both the Declaration of Independence and Constitution?
George Washington
Thomas Jefferson
John Hancock
Benjamin Franklin
The correct answer is Benjamin Franklin
So why is this answer correct? : The Declaration of Independence was signed by 56 people, and the United States Constitution was signed by 40. However, only six people signed both documents, including Benjamin Franklin, who was the oldest signatory of both (he signed the Declaration at age 70 and the Constitution at age 81).