Ratified on June 21, 1788, the Constitution is the supreme law of the United States. It establishes the framework of the federal government and has been amended 27 times. The first ten amendments, known as the Bill of Rights, were ratified in 1791.
Looking for clause-by-clause commentary and cases? Browse the U.S. Constitution Annotated (CONAN) — 1,657 annotated clauses covering every article, section, and amendment (via Cornell LII).
Articles of the Constitution
The Bill of Rights
Amendments 1 through 10 — ratified December 15, 1791