The collections of the Library of Congress contain a wide variety of primary and secondary source material associated with the U.S. Constitution, including government documents, reference tools, photographs, and prints.
Provided below are links to primary and secondary research resources and materials within the Library as well as select external sources. Consult the Related Research Guides tab for additional Library research materials.
Below are links to sources for primary documents relevant to constitutional law and history.
For those interested in more deeply delving into the case law research that underpins much of the Constitution Annotated’s essays, below are resources for in-person and off-site researchers.
Government websites are increasingly offering free access to court decisions and legal documents online.
Subscription Databases
The subscription resources are available to researchers on-site at the Library of Congress. If you are unable to visit the Library, you may be able to access these resources through your local public or academic library.
Below are links to additional reading sources from the Congressional Research Service as well as select print secondary sources in the Library of Congress' collections on constitutional law utilized by CRS attorneys.