The historical reference to a "wall of separation" between religion and the state can be found in

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The historical reference to a "wall of separation" between religion and the state can be found in the writings of Thomas Jefferson, specifically in his letter to the Danbury Baptists in 1802. This phrase has been cited in later Supreme Court decisions but was not explicitly stated in the Constitution or Bill of Rights.

The Historical Reference to a "Wall of Separation" Between Religion