A trilogy is a set of three distinct works that are connected and can be seen either as a single work or as three individual works. They are commonly found in literature, film, and video games. Three-part works that are considered components of a larger work also exist, such as the triptych or the three-movement sonata, but they are not commonly referred to with the term "trilogy". Most trilogies are works of fiction involving the same characters or setting, such as The Deptford Trilogy of novels by Robertson Davies, The Apu Trilogy of films by Satyajit Ray, The Kingdom Trilogy of television miniseries from 1994 to 2022 by Lars von Trier. Other fiction trilogies are connected only by theme: for example, each film of Krzysztof Kieślowski's Three Colours trilogy explores one of the political ideals of the French Republic (liberty, equality, fraternity). Trilogies can also be connected in less obvious ways, such as The Nova Trilogy of novels by William S. Burroughs, each written using cut-up technique. The term is seldom applied outside media. One example is the "Marshall Trilogy", a common term for three rulings written by U.S. Supreme Court Chief Justice John Marshall from 1823 to 1832 concerning the legal status of Native Americans under U.S. law. Trilogies—and series in general—are common in speculative fiction. History Trilogies ( trilogia) date back to ancient times. In the Dionysia festivals of ancient Greece, for example, trilogies of plays were performed followed by a fourth satyr play. The Oresteia is the only surviving trilogy of these ancient Greek plays, originally performed at the festival in Athens in 458 BC. The three Theban plays, or Oedipus cycle, by Sophocles, originating in 5th century BC, is not a true example of a trilogy because the plays were written at separate times and with different themes/purposes. An example of a modern trilogy in popular fiction would be J. R. R. Tolkien's The Lord of the Rings (1954-1955), which was published in three parts for economic reasons (although it was written as a single novel). In addition, technical changes in printing and film in the mid-to-late 20th century made the creation of trilogies more feasible, while the development of mass media and modern global distribution networks has made them more likely to be lucrative. Other examples of trilogies in fiction include the Wayfarers trilogy by Knut Hamsun, the Cairo Trilogy by Naguib Mahfouz, The Border