The Frozen Throne

The Throne of the Lich king, also called the Frozen Throne, was the Frozen throne of Northrend, located within the icecrown Citadel's Throne chamber.

The throne room of the Lich King and leader of the Scourge, Ner'Zhul, was located at the Icecrown Citadel of Northrend. It housed the ancient Throne of the Lich king,

it was later destroyed the black knight slashed his sword the ice destroying the the Frozen Throne and The Lich King with it

Description
The throne room was a massive chamber situated within mount icecrown in the cold region of Northrend which served as the Scourge's de facto capital.[4] The chamber was veiled by an enormous Cavern. The Lich king, governed the Scourge from the throne room, typically by mentally projecting his ghastly form or issuing instructions to various subordinates within his domain.