The Archive Tower Giant Door Key, not to be confused with Archive Tower Giant Cell Key is a key item in Dark Souls.
- Key to the giant door leading out from the uppermost floor of Archive Tower, which now serves as a prison.
- The key's design resembles not the key of a prison; indeed, the tower was once no prison at all, but a trove of precious tomes.
In the chest behind the gramophone, guarded by two Serpent Soldiers and a Serpent Mage.
In order to escape, opens the large door at the top of the ladder of the Archive Tower.