First Age 510
From Tolkien Gateway
- (Early Summer): Fall of Gondolin. Resulting deaths of Turgon the Wise, Ecthelion of the Fountain, Glorfindel of the Golden Flower, Maeglin, Penlod of the Pillar and the Tower of Snow, Duilin of the Swallow, Rog of the Hammer of Wrath, Gothmog, Lord of Balrogs, Orcobal, Balcmeg, Othrond, Lug, and possibly Salgant of the Harp.
- Ereinion Gil-galad becomes High King of the Noldor