Board Thread:Lore Discussion/@comment-25958616-20150904144417/@comment-36.70.116.161-20150914145433

^continuing post above,

Other than that, it's interesting theory that Sen and Seath might be one and the same, considering he's the only one with a shard of Lord Soul who's the nearest to Anor Londo, means he have all the time after Gwyn linked the flame to build that fortress. But another thing is, 'Sen' or 千 literally means 'Thousand' in Japanese. As EpicNameBro stated, 'Sen's Fortress' could literally means a fortress of a thousand traps. Still, if we looked at the Cage Key description,

"If a hapless adventurer becomes fatigued during an imprudent attempt to overcome the fortress, the serpent men will not kill him, but lock him up in a lonely cage. Eventually, unless they have forgotten, they drag the victim off to who-knows-where."

".....'''who-knows-where." '''highly likely Duke's Archives, since we did see the these serpent men in the Duke's Archives, as you stated in the original post.

So, yeah. Sen's Fortress could literally means a fortress of thousand traps, or could be Seath's Fortress, though the theory of dragons being snakes with powerful souls a bit too weak considering dragons don't really have souls, except their descendant and distant cousins.