Part 1 of our complete Great Circle walkthrough covers the prologue and the entire Vatican chapter — every main-story puzzle, all missable collectibles, and the side content worth doing before you leave for Gizeh.
Prologue: the break-in
The opening is linear but teaches the two systems that matter most: whip traversal and disguise. Grab every document on desks — several become lore entries you cannot return for.
The Vatican: first steps
Once the map opens, resist the main quest marker. First, buy the Vatican map from the vendor near the fountain — it marks all collectibles and pays for itself immediately. Then pick up the camera: photographs of murals are both collectibles and puzzle hints.
Puzzle: the fountain inscription
The Latin inscription references the four evangelists. The solution is to align the statues in the order shown in the fresco inside the chapel — photograph the fresco, then match the fountain statues to the fresco’s left-to-right order.
The Sistine Chapel photograph is only available during your first visit, before the story event that restricts the area. Take it before progressing the main quest past the library.