How to Solve the Secret of Secrets Puzzle in Indiana Jones and the Great Circle

Dive into the intricate "The Secret of Secrets" puzzle with our detailed guide. Learn how to use Father Antonio's key, navigate through the courtyard, and decipher the clues hidden in Nicolette's letter in Indiana Jones and the Great Circle. Discover the correct combination to unlock the safe and earn valuable rewards, including the Secretum Secretorum book and a secret letter, enhancing your gameplay and strategy.

You can begin solving the next puzzle immediately after obtaining the key from Father Antonio and making your way to the courtyard. To do this, head to the right side of the main square and open the massive gates. Then turn left and run to the large truck.

To the right of it, you will see an open passage. Enter inside and use the key on the door to the right to ascend to the Sistine Chapel. In the back room, on the table, you will find a safe, and next to it, Nicolette's letter, which you need to take.

This letter contains clues to help solve the puzzle. It suggests that players pay attention to the stars and saints: Peter with the key and Paul with the sword.

Start on the right side of the safe, where there is a wooden statuette of Saint Peter, distinguished by his key. Lifting it, players can inspect and turn the statuette to see two symbols engraved in white paint at its base. These symbols represent the astronomical signs of Mars, repeated twice (4, 4).

The next step is to return to the safe, where you can find the statuette of Saint Paul, recognizable by the sword. Inspecting its bottom, players will discover two more symbols: Uranus and Mercury (7, 1).

In the drawer of the table opposite the safe, players can find a note with a Planetary Map, listing the astronomical symbols of all planets except Pluto. On this map, starting from Mercury (at the bottom of the page), the planets are numbered from 1 to 8, with Mars being the only missing symbol, corresponding to the number 4.

The correct combination to solve the puzzle is 4471.

After entering it and opening the safe, players will receive a fake book Secretum Secretorum, the Cutman 1 book, which significantly enhances health bar recovery efficiency, as well as a secret letter.