A
tetralogy (from
Greek τετρα- , "four" and -λογία
-logia, "discourse") is a compound work that is made up of four distinct works. The name comes from the
Attic theater, in which a tetralogy was a group of three
tragedies followed by a
satyr play, all by one author, to be played in one sitting at the
Dionysia as part of a competition.