Board Thread:Lore Discussion/@comment-6311114-20130719222148/@comment-31396746-20170407020951

Dragons only ever ruled skyrim, as that was were they were worshipped. They were also on Solstheim because that was part of skyrim during their rule. Dragons have been seen in other areas though, in Twin Secrets it was said that a Dragon was found hiding in the crater of Red Mountain. Another Dragon, his Priest and a section of the cult was also once exiled from Skyrim, with them ending up in Wrothgar.