This achievement is quite self-explanatory, but missable. I recommend clicking all panels behind the statue right when you come to the second tower (go two screens to the right after entering the tower) because once you solve a certain puzzle you cannot go back to this hall. That happened to me so I had to replay around 20 minutes of the game again.
Edit: For anyone wondering how the hall looks like, here's a link: -
https://imgur.com/a/OHMEH