This trophy is unlocked on Chapter 9.
It is missable if playing as Emily or Corvo. Taking the Throne won't unlock you this trophy which looks like it is a High Chaos ending. Once you have eliminated Delilah you return to the Throne Room from the painting and either Corvo or Emily will be in stone approach them and press
then they will be reanimated. After a short dialog it will load up the ending cutscene. This is the final story related achievement