The Establishment Clause is the first of several pronouncements in the First Amendment to the United States Constitution, stating, The Establishment Clause was written by Congressman Fisher Ames in 1789, who derived it from discussions in the First Congress of various drafts that would become the amendments comprising the Bill of Rights. The second half of the Establishment Clause includes the Free Exercise Clause, which guarantees freedom from governmental interference in both private and public religious affairs of all kinds.