who wrote the bill of rights?

The Bill of Rights was primarily written by James Madison. After the Constitution was ratified in 1788, Madison took on the task of drafting the Bill of Rights. He drew largely from the Virginia Declaration of Rights, authored primarily by George Mason, and from amendments suggested by state ratifying conventions. Madison proposed 19 amendments to Congress on June 8, 1789, which were then narrowed down and eventually ratified as the first ten amendments to the U.S. Constitution on December 15, 1791. Madison is considered the chief architect of the Bill of Rights and was instrumental in its passage to protect fundamental liberties.