Board Thread:Lore Discussion/@comment-153.107.33.152-20140620001033/@comment-69.123.217.197-20150219210614

Because there are conflicting sources regarding the Dragon Cult and how widespread it was. Some claim that it, and the Dragons themselves, lorded over the entirety of Tamriel (possibly Nirn), while others restrict its influence solely to Skyrim. Because of the unreliable narrator, we do not know.