Is the twenty-third chapter of the Quenta Silmarillion which is the third part of J. R. R. Tolkien’s The Silmarillion.

• 23 - Of Tuor and the Fall of Gondolin – This chapter tells of the coming of Tuor to Gondolin, his marriage to Idril, the birth of Eärendil, the betrayal of Maeglin, and the fall of Gondolin.