This the Procession of Gods puzzle; with a lot of squares - each with a God's head?
If so - you have to see the clue first on how to arrange it.
You shou;d have done the 3 puzzles in the scarab room: the scarab, the translation of the hieroglyphs on the wall and the 4 sons of Horus on the opposite side of the scarab puzzle.
Then you should go to the event that happened.
