The Dreadfort

Grim seat of the Boltons, whose banner is a flayed man and whose loyalty is a knife held politely.

The fuller tale

The Boltons keep the DreadfortÔÇÖs old, ugly reputation intact through the Dance without needing to add to it ÔÇö the war passes the North by for most of its length, and the flayed-man banner stays home, one grim castle among many waiting on WinterfellÔÇÖs word before it moves.

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

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