The Supreme Court is established by Article III, Section 1 of the Constitution of the United States, which says: "The judicial Power of the United States, shall be vested in one supreme Court .

The size of the Court is not specified; the Constitution leaves it to Congress to set the number of justices.

were decided, the Court comprised these seven justices: Barron v. Baltimore, 32 U.S. (7 Pet.)

243 (1833), is a landmark United States Supreme Court case which helped define the concept of federalism in US constitutional law.

Over time, in the later 19th and into the 20th Centuries, however, the Court incorporated parts of the Bill of Rights to apply to state governments.