Kingdoms - Crusader Kings II Wiki

The 30 year requirement makes “High Kingdom of the North Sea” extremely challenging : r/CrusaderKings

When The World Stopped Making Sense - Crusader Kings II Wiki

I've never seen this kingdom before and I literally can't find any info on it on the web it's even not listed on the ck3 wiki in any of the kingdoms. Has

Road to Russia: Guide to the second Orthodox Empire, Crusader Kings II Wiki

Principality of Taranto - Wikipedia

De jure - Crusader Kings II Wiki

Warning about North Sea Empire, and how this should be changed

Holy orders - Crusader Kings II Wiki

Kingdom of Ireland, Crusader Kings II Wiki