Downfall of Barad-dûr

From Tolkien Gateway
The name The Fall refers to more than one character, item or concept. For a list of other meanings, see The Fall (disambiguation).
"Towers fell and mountains slid; walls crumbled and melted, crashing down; vast spires of smoke and spouting steams went billowing up, up, until they toppled like an overwhelming wave, and its wild crest curled and came foaming down upon the land."
― Vision of Samwise Gamgee in The Return of the King, Mount Doom

On March 25 T.A. 3019 Barad-dûr was utterly destroyed, a result of the One Ring being unmade as it fell into the Cracks of Doom whilst in the clutches of the creature Gollum.

The One Ring was said to be the foundation of Barad-dûr[1], this great tower of Sauron could only stand whilst the power of the One Ring endured.

References