sentences:  Tolkien's legendarium
  
  Tolkien's legendarium is the body of J. R. R. Tolkien's mythopoeic writing that forms the background to his "The Lord of the Rings", a high fantasy novel which is widely considered to be his "magnum opus".Tolkien began to develop his legendarium in poems, paintings and nomenclature by 1914, and composed the earliest drafts of its stories by 1916 (published in 1983's "The Book of Lost Tales").