United States Constitution

The United States Constitution was written at the Constitutional Convention in Philadelphia in 1787 on Earth and subsequently ratified by the original thirteen states.

In 2267, the United States Constitution was among the historical legal texts Samuel T. Cogley evoked in his defense of James T. Kirk at his court martial for criminal negligence. 

The Yangs of planet Omega IV were apparently descended from a parallel United States of America, and carried an original copy of the Constitution with them, which they considered the holiest of holy words.

Captain James T. Kirk impressed their tribal elders with an impassioned, memorized recital of its Preamble, explaining that while throughout the galaxy, many documents are equally good and as well-respected, none says its "thing of importance" in quite the same way. 

Background
"The Omega Glory" makes it clear that the war there occurred generations ago, and post war the lifespan lengthened to about a thousand years. This places the war well before 1200 AD, meaning that Omega IV had the United States of America, the Pledge of Allegiance, and the United States Constitution several centuries before Earth.

Constitution des Etats-Unis