User blog comment:Zippertrain85/Dawnguard Follow up./@comment-13446185-20131025003722

You're wrong, Serana is found in an ancient Nordic crypt and when you free her she says "this place looks pretty different from when I was locked away". Implying that she was locked up while the crypt was still in use. Which would most likely be around the time of the Dragon Priest during the late Merethic era.

For example, in the Elder Scrolls Online there was no Empire in Cyrodiil.

You gotta be kidding me, you do realize that ESO takes place during the Interregnum, everyone was scrambling to become the most powerful nation because the empire was no longer there to stop them. Anyone with a brain would know what the Empire was especially royalty.

Here is Serana's Dialogue:

"Empire? what... what Empire?"

"Cyrodiil is the seat of an empire?"

"I must have been gone longer than I thought"

This implies that not only did she not know there was an empire in Cyrodiil she did not know of any empires during her time, this could mean that the volkihars date pre-first era, which would be evidence that supports her being locked away in a Nordic ruin.

There are records of all kings in Skyrim, there has never been a reference to Harkon or his family in any of them.

First of all there isn't records on all the king of Skyrim, there is thousands of years of unrecorded High Kings.

Second of all there is a reason they are called High Kings. Just because all the holds in TESV were ruled by Jarls doesn't mean a hold can't be ruled by a King, an example of this would be King Mantiarco of Solitude or Queen Macalla of Dawnstar. The reason why a High King is called a High Kings is because they have the ability to rule over other lesser Kingdoms.

'she knows what the city of Solitude is despite that city having close connection with the Empire. If she supposedly was alive before the Empire existed than odds are Solitude didn't exist either.'

First of all Solitude was a Nordic city long before the Imperials had any connection to it. Nordic ruins found under the city seem to date it to the Dragon Cult and though probably not as old as Whiterun or Windhelm, also it was a prominent city during the War of Succession meaning that it is probably rather old. Imperial connections to Solitude were nonexistant until the Septim Empire which if my dating is correct is about 4000 years after the cities' construction.