The Declaration of Independence was signed in the 18th century, specifically in the year 1776. This pivotal document marked the formal separation of the thirteen American colonies from British rule. Drafted primarily by Thomas Jefferson, it articulated the colonies' grievances against King George III and laid out foundational principles concerning individual rights and governance. The signing took place on July 4, 1776, a date now celebrated annually in the United States as Independence Day. The Declaration's influence extended beyond its time, inspiring various movements for freedom and self-determination around the world.