The era of the sea kingdom. Godred Crovan's conquest at the Battle of Sky Hill in 1079 founded the dynasty that would rule for nearly two centuries. Tynwald formalised governance at a site the Manx people already considered sacred. The 32 Keys served a kingdom that stretched across the Hebrides. Norse and Celtic traditions intertwined — Thorwald's Cross at Kirk Andreas carries Odin on one face and Christ on the other. The diocese of Sodor answered to Trondheim, not Canterbury. Rushen Abbey kept the Chronicles of the Kings of Mann and the Isles. The Treaty of Perth in 1266 ended Norwegian suzerainty.