User blog comment:Speculation no Kyojin/Episode 25 - The Titan in the wall/@comment-54.81.140.27-20140608170059/@comment-68.204.136.139-20141005042419

Ok way back when bertolt and what's his name wasn't immortal b/c he wasn't a Titan they had a project which whent against the cities religion they tore all of their scientific work up and now they want revenge