Oros

A Valyrian city drowned and broken in the Doom.

The fuller tale

One of the Valyrian cities drowned and broken in the Doom, Oros has been a dead city for four centuries by the time the Dance is fought — its ruin, like all of the Freehold’s ruin, long predates the dragon-line’s Westerosi civil war and has nothing to add to it.

The fallen of this place — if any, they are named here. Spoilers.

No death the chronicle records has come to this ground — or none the maesters have set down.