Board Thread:Lore Discussion/@comment-4092092-20130801070333/@comment-26893431-20170522174605

Dapoculos13 wrote: You are trolling and bait-posting. I regret to inform you that your facts are wrong. Urag gro-Shub states that had he not taken his work seriously, most of the books within the College library would have been dissolved or turned to ash before the Thrid Era, suggesting he is over 600 years old. The same applies to Queen Barenziah, who was born prior to the Third Era. It's not known whether or not she died, though we do know she lived for well over 400 years, breaking your statement. She was not known to be well versed in magic, rather she was a thief and diplomat, having spent time with the Thieves' Guild in which she met Symmachus, another Mer who lived well beyond the 300 year mark, and he wasn't known for being a mage either. As a small, additional tip, Orsimer are considered Mer, not Beast. They are, or were, transformed Aldmeri worshippers of Trinimac prior to him being "devoured" by Boethiah. As their god reformed into Malacath, so did his followers.

It may be an official source - from the ESO team themselves, but it's clear to see their knowledge on Mer is lacking. Or the in-universe lore is lacking. Mer are considered Beast, read the pocket guides.