Read through the actual text of the US Constitution

The US Constitution has been amended 27 different times since its ratification

Dive deeper into each amendment to the Constitution with resources provided by the National Constitution Center. This website features podcasts, videos, and other web resources for each of the amendments, examining their creation and their impact on today’s political and social landscape.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

Surprises you may not know about the US Constitution

This article offers intriguing and lesser known insights into the creation and content of the US Constitution. Examples include that Rhode Island disliked the Constitution so much that it almost started a civil war and that Ben Franklin was so ill he needed to be carried into the Constitutional Convention in a sedan chair.

The US Constitution has influenced rights and governments worldwide

This interactive tool from the National Constitution Center allows you to compare constitutional rights globally, highlighting which countries have adopted protections similar to those in the US Constitution—and how shared principles manifest in different legal forms around the world.

The Constitution included compromises that still shape the US today

The creation of the Constitution necessitated numerous compromises to accommodate the diverse interests of the states. The significant compromises included resolutions on debates over representation in Congress and the status of enslaved individuals.

Explore the most impactful Supreme Court cases in US history

Browse by constitutional topic to explore key rulings, their historical impact, and the legal principles they established. Each case includes a summary of the decision, along with notable excerpts from majority and dissenting opinions.

Read the Federalist Papers—the essays that defended the proposed Constitution

Written between 1787 and 1788, the Federalist Papers—85 essays by Alexander Hamilton, James Madison, and John Jay—defended the Constitution and articulated the logic of federalism. They remain a key guide to the original interpretation of the Constitution.

Debating the Constitution today

The Constitution continues to shape our political and social life today. If you want to understand how today’s political debates connect to the Constitution, check out this podcast from the National Constitution Center. The weekly program features experts from diverse perspectives and explores how constitutional principles shape modern issues.

Explore the world's oldest constitutions

The 1789 US Constitution remains the oldest active written national constitution. Older systems exist—such as San Marino’s statutes or the Magna Carta—but they are not single, codified constitutions. See how other countries compare in this visualization.

Trace how the Bill of Rights, inspired by centuries of political theory, took shape between 1774 and 1789.

Take a deep dive into the constitutional foundations of judicial review

In this episode of "This Constitution," the hosts take a law-focused approach to judicial review—examining its roots in Article III and the supremacy clause, its development through Marbury v. Madison, and the ongoing constitutional debates about whether the court's power strengthens or strains American democracy.

Constitutional originalism and living constitutionalism are the 2 main theories of interpretation

Hear from experts about originalism—the view that the Constitution should be interpreted according to its original public meaning—alongside its main counter-ideology, living constitutionalism, which argues that the document's meaning should evolve with changing social and legal norms.

Madison's meticulous notes of the Constitutional Convention are the most thorough record of the event

During the Constitutional Convention, James Madison took detailed daily notes of the debates, speeches, and votes. His Notes on the Debates in the Federal Convention is the most comprehensive and authoritative account of the convention, shaping historians' understanding of the Constitution's origins.

Learn how the US tax code works and why it's important

First published in 1926, the US Code is the official codification of federal statutes in the US. Title 26 of the US Code, for instance, lists all of the federal tax laws of the United States. A new edition is published every six years.

A primary source timeline of US history (1600-1968)

Compiled by the Library of Congress, this archive walks through important events in US history through civil rights era, while providing primary sources to explore.

Explore the specific authorities granted to Congress: the 'enumerated powers'

The Constitution grants Congress a list of powers—including taxing, regulating interstate commerce, and declaring war—while powers not explicitly listed are reserved to the states or the people, defining the federal government's scope of authority.

See what it's like to live 'Constitutionally' for a year

In a 2023 interview on CBS Sunday Morning, author A.J. Jacobs discusses his attempt to live as closely as possible by the principles of the US Constitution for a whole year and the book that resulted from the experiment.

Congress meets and legislates in the US Capitol building

The United States Capitol reflects neoclassical ideals drawn from ancient Greece and Rome. First opened to Congress in 1800 and repeatedly expanded over time, it remains the symbolic and functional home of both The House and The Senate.

Read the language in the Constitution that protects religious freedom in the US

The First Amendment's religion clauses include two provisions: the establishment clause and the free exercise clause. These two parts prevent the government from endorsing any specific religion and from interfering with the free practice of religion.

Read the lyrics for ‘The Star-Spangled Banner,’ annotated by historians

The national anthem features a number of specific references (and outdated sentiments) that might be lost on modern listeners. This resource allows you to decode some of Key’s more complicated lines by reading accompanying notes from three specialists.

Read an overview of US tariff policy before the second Trump Administration

This comprehensive report from the Congressional Research Service explores the evolving role of tariffs—from a major source of government revenue to a tool for trade and foreign policy—providing insights into current practices, legal foundations, and global trade dynamics.

A guide to US pay transparency laws

Pay transparency laws in the US are evolving quickly, as some states introduce them for the first time and others update existing legislation. This resource has an updated list of key pay transparency legislation in states across the country, as well as general explainers about what each of those laws dictate. Check it out here.

What the Declaration actually says and how to see it

This official page from the National Archives breaks down the Declaration of Independence in plain English, explaining its purpose, key ideas, and grievances against King George III. It also shows how the document was created and where it’s displayed today.

Read SCOTUSblog for daily, nonpartisan coverage of the US Supreme Court

Founded in 2002, SCOTUSblog offers expert analysis from lawyers, professors, and journalists. The blog provides transparent, unbiased explanations of significant cases, real-time updates on decisions, and insights into court nominations and trends.

Understand the US electorate demographics

Ever wonder how much of each group make up the American voting bloc? Find raw data from the '16 and '18 elections broken out by a variety of factors (click on "validated voters database" link).

Watch 'I'm Just a Bill' explain how a law gets made

First aired in 1976, "I'm Just a Bill" became a defining civics lesson for generations, using animation and humor to trace the legislative process and cement itself as a lasting piece of US political culture.

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

The US Currency Education Program created a guide to authenticating currency

This video was created to teach everyday people a few easy ways to spot some counterfeit banknotes. Specifically, it outlines the main security features to check for that are common across many US banknotes, such as the color-shifting ink visible when tiling US banknotes $10 or higher.

Learn how to read a prospectus, the juicy document that any company must file with the SEC before going public.

Despite being favored by 87% of Americans, Congress does not have term limits.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

The idea for the Federal Reserve was conceived in secret in 1910—with bankers donning duck hunt gear for disguise while traveling to a remote country club on Georgia's Jekyll Island

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

Jimmy Carter signed a 1978 bill that legalized home brewing, a move credited with kick-starting the craft beer industry.

Visualize how CRISPR-Cas9—a type of immune system used by single-celled organisms to attack invasive viruses—targets and makes precise changes to a gene's DNA.

Browse a detailed visual analysis of over 200,000 similes—comparisons that often use 'like' or 'as'—from popular fiction to see how frequently writers the same idiomatic expressions.

View the ten deadliest tornadoes in US history.

Studies suggest when you sleep is as important as how much you get, and syncing with your circadian rhythms may lead to less fatigue and improved long-term health outcomes

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

The Brothers Grimm were lawyers before they were storytellers, and became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

The syncytiotrophoblast is the outer layer of the placenta and the largest human cell, spanning an area about twice that of a king-sized bedsheet.

Watch the cumbersome, but necessary, precautions healthcare workers must take to care for and protect themselves while caring for Ebola patients.