The Matter of Britain stories, focusing on King Arthur, are one of the most popular literary subjects of all time, and have been adapted numerous times in every form of media. This list enumerates some of the notable works.

Modern literature

Theatre

Musical theatre

Straight plays

Verse plays

The Arthurian legend has proved a constant source of material for verse dramatists. Several adaptations exist, most dealing with the love triangle between Arthur, Guinevere and Lancelot. Some notable examples are:

Classical verse plays

Modern verse plays

Opera

Film

English-language theatrical films

Relatively straightforward adaptations of the legends, reconstructed history, or modern Arthurian material.

Adaptations of the original Arthurian Legend

These films are generally based on Matter of Britain which are set in medieval time period and King Arthur's the main character.

Adaptations of Tristan legend

English Language films that are based on the legend of Tristan and Iseult, which originated in the 12th century

Adaptations of Sir Gawain and the Green Knight

Sir Gawain and the Green Knight (Middle English: Sir Gawayn and þe Grene Knyȝt) is a late 14th-century Middle English chivalric romance. It is one of the best known Arthurian stories, the following films are directly based on the romance:

Films based on A Connecticut Yankee in King Arthur's Court

Films based on Mark Twain's novel A Connecticut Yankee in King Arthur's Court, about a modern man/woman who travels in time to Arthur's period.

Films based on Prince Valiant

Prince Valiant is an American comic strip set within the Arthurian Legend. The following films were based on the comic strip:

Films set in the Roman Empire

These films generally feature King Arthur, in Roman Empire settings and as the main character.

Animated films

Modernization and parodies

Productions whose plot "updates" or otherwise moves the legend to modern times.

Foreign-language films

Foreign-language films based on the medieval Arthurian legends

Films based on Richard Wagner's Parsifal

Foreign-language films that are based on Wagner opera

Films based on the Tristan legend

Foreign-language films that are based on the legend of Tristan and Iseult

Other films

Foreign-language animation, derivative works, parodies and modern settings:

Television

English-language, Live-action Television series and films

Television films and specials

Television films and specials, modernization and parodies

Television mini series

Television series

Television series, modernization and parodies

Animation

Television films and specials

Television series

Foreign-language television series and films

Live-action television series

Animated television series

Audio

Paintings

Tapestry

Comics

Advertising

King Arthur is the namesake of a brand of flour, King Arthur Flour.

Games

Board games

Role-playing games

Video games

MMOs

Music

Anthem of Cornwall