The ironborn consider Old Wyk to be the holiest of all the Iron Islands. The legendary Grey King slew the sea dragon, Nagga, upon its shore. It is on Old Wyk where the First Men found the Seastone Chair, the traditional throne of the Iron Islands.
The Grey King's Hall was where kingsmoots to choose the High King of the Iron Islands were held for thousand of years, beginning with the crowning of Urras Greyiron by Galon Whitestaff. His son, Erich I Greyiron, later tried to claim the crown without a kingsmoot, but opposition from Galon led to Erich renouncing his claim and the selection by kingsmoot of Old Wyk's rock king, Regnar Drumm.
The selection of high kings through the kingsmoot ended when Urron Greyiron gathered his rivals to Old Wyk and slaughtered them amidst Nagga's ribs. Old Wyk's rock and salt kings were reduced to lords sworn to hereditary dynasties of iron kings.
When a sept was built on Old Wyk during the reign of King Horgan Hoare, the priests of the Drowned God burned the sept, killed the septon, and drowned its congregation. The king reacted by slaughtering the priests of the Drowned God, earning him the sobriquet Horgan Priestkiller.
A Clash of Kings
A Feast for Crows
At Pebbleton, Aeron Greyjoy preaches that a kingsmoot should be held on Nagga's hill on Old Wyk to choose the new king. Euron Greyjoy is chosen King of the Isles and the North by the assembled ironborn during this kingsmoot.
A Dance with Dragons
- A Feast for Crows, Map of the Iron Islands
- The Lands of Ice and Fire.
- A Clash of Kings, Chapter 24, Theon II.
- A Feast for Crows, Appendix.
- A Clash of Kings, Chapter 19, Arya V.
- A Feast for Crows, Chapter 18, The Iron Captain.
- The World of Ice & Fire, The Iron Islands.
- The World of Ice & Fire, The Iron Islands: Driftwood Crowns.
- The World of Ice & Fire, The North: The Kings of Winter.
- The World of Ice & Fire, The Iron Islands: The Iron Kings.
- The World of Ice & Fire, The Iron Islands: The Black Blood.
- The World of Ice & Fire, The Iron Island: The Greyjoys of Pyke.
- The World of Ice & Fire, The Iron Islands: The Red Kraken.
- A Storm of Swords, Chapter 67, Jaime VIII.
- A Clash of Kings, Chapter 11, Theon I.
- A Feast for Crows, Chapter 1, The Prophet.
- A Feast for Crows, Chapter 19, The Drowned Man.
- A Dance with Dragons, Chapter 26, The Wayward Bride.