Nathan Dorn, left, exhibition curator, discusses the 1215 Lincoln Cathedral Magna Carta with HRH The Princess Royal, Vice Admiral Sir Tim Laurence, and Sir Peter Westmacott, during a tour of the Library of Congress exhibition, “Magna Carta: Muse and Mentor.” Photo by John Harrington

One of only four surviving copies of the Magna Carta — ever heard of it? — is now on display at the Library of Congress through January.

On loan from England’s Lincoln Cathedral, the 800-year-old document is being displayed as part of the 10-week exhibition, “Magna Carta: Muse and Mentor,” which tells the “story of the charter’s creation in England, reinterpretation through the centuries, and emergence as an enduring document of constitutional law in the United States.”

The Library’s 10-week exhibition will feature medieval manuscripts, published works, prints, photographs, maps, posters and annotated draft opinions by justices of the U.S. Supreme Court. The 75 items will be drawn from the collections of the Law Library of Congress and from the following custodial divisions at the Library: Prints and Photographs; Rare Book and Special Collections; Music; Manuscript; Geography and Map; and Serial and Government Publications.

If you don’t have time to visit the historic document by January 19th, all is not lost. The National Archives, also free to visit, is home to David M. Rubenstein’s copy of the Magna Carta.