Eden
Eden or the Garden of Eden (Hebrew גַּן עֵדֶן, Gan ʿEdhen; Arabic: جنة عدن, ) is described in the Book of Genesis as being the place where the first man, Adam, and his wife, Eve, lived after they were created by God. Literally, the Bible speaks about a garden in Eden (Gen. 2:8). This garden forms part of the Genesis creation narrative and theodicy of the Abrahamic religions, often being used to explain the origin of sin and mankind's wrongdoings and mistakes.
Assassin's Creed Series

Eden was a place where the people of the first civilization were known to exist. They were an advanced race of species believed to have created humans, whom they had enslaved using equipments later known as Pieces of Eden, inorder to rebuild their civilization.
Adam and Eve are believed to be the first humans capable of resisting the power of the artifacts. They are know to have escaped the compound along with an artifact later known as "Apple of Eden".
Gallery
-
Humans being controlled in Eden.
-
Adam and Eve with an artifact.