User blog comment:Zippertrain85/The reasons why Serana is not from the First Era./@comment-121.219.169.69-20130518094845

As for advancement of architecture, all of Tamriel was not one single civilization, where technology everywhere progressed at the same rate. You may as well argue that the Dwemer don't make sense bacuse they were so more advanced than the other races in their time, and still are. As for the Moth Priests, it is not known when they were founded.

Regarding the thing about her being so much older than the other vampires, well you do know of the Roman Empire right? It's far older than youand no longer exists but you do know of it. So, what would stop the other vampires from knowing about Serana?