One thousand years on from the bloody Battle of Clontarf, 1014 Retold is re-telling it on Twitter, from a variety of perspectives, including Kings, Queens and Viking invaders.
And it turns out, medieval Irish history is basically Game of Thrones. Though admittedly, without dragons.
The build-up is tense, to say the least.
#Sitric: I mean to steer some of that #Viking fleet towards Irish shores, to bring our laws and our ways to all Ireland.
#Donnchad: We march tomorrow, to the little farms and mills, to take meat and bread, burn houses and break heads.
#Slaine: All the tribes of the north, the dread #vikings, mercenaries and berserkers, converge on #Dublin to challenge the #DalCais.
#Gormlaith: So my brother #MaelMorda dreams of an easy win over the #DalCais. Poor fool.
Marriages forge and break alliances.
#BrianBoru: Though #Sitric #Silkbeard took my daughter #Slaine as wife, he does not respect me as his father or his king.
Family strife turns into war.
#MaelSechnaill: So my pretty young wife #MaelMuire presumes to advise me on matters of kingship and state, politics and warcraft.
Politics gets done over beer and feasting.
#Sigurd: I wager it's not just for my fine brews and sweetmeats he visits. So let’s drink and talk business like men.
There's even a coin involved.
#Fishwife: The coin read 'SITI R+ DIFLIMELI' (Sithric King of Dublin) #Sitric
It also offers useful advice from ancient Ireland.
#IrishWisdom: If the head cannot bear the glory of the crown, better be without it.
The many epic characters involved are all laid out on the website.
Gormlaith - Consort of kings, mother of rulers, the power behind the throne.
Brian Boru - Emperor of Ireland, leader of the Dal Cais clan, and great warrior.
Sitric - King of Dublin, Norse nobleman, architect of the rebellion.
Brodir - Feared Viking warrior and sorcerer, leader of the Isle of Man fighters.
There's also the 'Game of Retweets,' where everyone can take sides and join the battle.
The project is also holding Ireland's first ever live Wikipedia Edit-a-thon.
SPOILER WARNING: Historical details of the battle can be read online in the Annals of Innisfallen and the Annals of Ulster.
Yes, that is a 1000-year old Spoiler Warning, if you'd rather follow along on Twitter instead.