About five hours in on the first disc you'll find a room with seven paintings, each with a switch below it. In order to solve the puzzle you must press the switches below each painting in the correct order. Below is the order in which this must be done.

1. Painting of the Woman
2. Man with two babies
3. Man by himself
4. Man with plate
5. Man with book
6. Man with candle
7. Big painting