The Fall of Gondolin

J. R. R. Tolkien's The Fall of Gondolin is one of the stories which formed the basis for a section in his posthumously-published work The Silmarillion, with a version later appearing in The Book of Lost Tales. In the narrative, Gondolin was founded by King Turgon in the First Age; the city was carefully hidden, enduring for centuries before being betrayed and destroyed.

A stand-alone, book-length version of the story edited by Christopher Tolkien was published in 2018. The Fall of Gondolin is one of three stories from the First Age of Middle-earth that was published as a stand-alone book: the other two are Beren and Lúthien and The Children of Húrin.