McCreary County v. American Civil Liberties Union (2005) held 5-4 that Ten
Commandment displays in Kentucky county courthouses violated the First
Amendment’s establishment clause.
Pleasant Grove v. Summum (2009) determined a city could refuse to place a
monument in a public park because it was a form of government speech immune
from First Amendment review.
Stone v. Graham (1980) said a law requiring the posting of the Ten
Commandments in every school classroom violated the establishment clause of
the First Amendment.
Van Orden v. Perry (2005) ruled that a monument depicting the Ten
Commandments in public park did not violate the establishment clause of the
First Amendment.
