Note: Elder Scrolls lore is generally not clear-cut. Reasons for this range from biased in-universe sources intentionally only giving you only one side of a story, to sources lacking critical information or working from false information, to the implication that All Myths Are True, despite the contradictions, or that at least all myths are Metaphorically True. Out-of-game developer supplemental texts (frequently referred to as "Obscure Texts" by the lore community) are more trustworthy, but are frequently left unofficial and sometimes later contradicted. Because of this, it is entirely possible for two contradictory statements in the below examples to both be true. (And due to frequent events in-universe that alter the timeline, both may literally be true in-universe.)
Due to length, this page had to be split into sub-pages.