I think that the Council of Ikea may have been even more damaging to the Imperium than the Council of Nikea. I mean, Ikea's furniture rarely has any skulls on it...
Only semi-related, but my wife and I saw Maisie Williams (Arya Stark from Game of Thrones) buying a load of stuff in the Bristol Ikea last year. We just figured that the 7th season was going to be centred around Jon Snow's struggles to build a Flugholf TV cabinet...