Blue Prince Inner Sanctum & Sanctum Sigil Puzzle Guide: Solve Every Room, Unlock Every Secret

In the hauntingly mysterious world of Blue Prince, every room is steeped in secrets, but none more so than the Inner Sanctum a shadowy basement chamber with a web of interconnected puzzles. This isn’t just any old side room. It’s the key to Room 34, your stepping stone to Room 46, and the gateway to uncovering one of the most elaborate mysteries in the game.

If you’re ready to piece together the puzzle, unlock ancient mechanisms, and discover hidden realms, this guide is your all-access walkthrough to conquering the Inner Sanctum, solving the Sanctum Sigil Puzzles, cracking the Mora Jai boxes, and unlocking the Eight Realms map.

What Is the Inner Sanctum in Blue Prince?

Beneath the lavish yet eerie halls of the Blue Prince manor lies the Inner Sanctum an underground area you’ll access during the main story arc on your path toward Room 46. Unlike other parts of the estate, the Inner Sanctum is puzzle-centric, housing eight locked rooms, each containing critical challenges and clues.

How to Access It:

• Reach Room 34, then continue downward into the basement.
• This area is formally known as the Inner Sanctum.
• Inside, you’ll encounter eight locked doors, a massive puzzle interface, and clues scattered across the mansion.

Sanctum Sigil Puzzles – Explained

The Sanctum Sigil Puzzles are your primary objective inside the Inner Sanctum. Each of the eight rooms features a large puzzle mechanism defined by a central sigil a symbolic core surrounded by moving parts.

Puzzle Mechanics:

Each Sigil Puzzle includes four dials:

1. Top Dial – Adjusts inner motes (symbols near the core)
2. Second Dial – Changes the rays or dividers between symbols
3. Third Dial – Alters the number of motes and rays
4. Bottom Dial – Modifies the outermost border symbols

Once the correct configuration is found, a button appears to validate your solution.

Clues: Where to Find Them

You won’t find all answers in one place. Clues are scattered across the manor embedded in books, hidden behind walls, or tucked away in locked drawers.

Key Clue Locations:

• Fountain Area (drain it to reveal a round altar)
• Secret Garden (destroy a weakened wall; ensure all wind vanes point south)
• Realm and Rune Book (from the Bookshop or Library)
• History of Orindia Book (contains lore of the realms)
• Passports in Vault Deposit Boxes (show diagrammed sigils)
• Lost and Found Floorplan (displays partial sigil outlines)
• Stamps and Letters (many from Simon contain symbols and colors)
• Mail Room & Library’s Stamp Collection Book
• Classrooms built via the Schoolhouse Drafting Studio
• Blue Memos from Blue Tents (includes nation color data)

Brute Forcing:

If you only have partial clues, don’t stress. You can still solve the puzzles through logic and a bit of trial and error but it helps to take notes from the clues above.

Sanctum Sigil Puzzle Solutions

Here are the core sigil solutions from left to right inside the Inner Sanctum:

Sigil 1: Plate

• Inner Motes: 5x chips
• Rays: 3x Byzantine crosses
• Border: Small and large opaque circles

Sigil 2: Pentagon

• Inner Motes: 8x double triangles
• Rays: 4x Byzantine crosses
• Border: Wavy lines

Sigil 3: Mountain

• Inner Motes: 5x square boxes
• Rays: Lightning strikes
• Border: Spiky triangles

Sigil 4: Hourglass

• Inner Motes: 5x flowers
• Rays: 3x triple rods
• Border: Horizontal and vertical lines

Sigil 5: Heart

• Inner Motes: 8x triple vertical lines
• Rays: 4x skewers
• Border: Alternating reversed triangles

Sigil 6: Cap

• Inner Motes: 8x control pads
• Rays: 8x straight lines
• Border: Hollowed circles

Sigil 7: Jigsaw

• Inner Motes: 8x Nordic sun wheels
• Rays: 5x wavy curved lines
• Border: Tire tread patterns

Sigil 8: Diamond

• Inner Motes: 4x double triangles
• Rays: 5x smooth curved lines
• Border: Shaded boxes

Rewards for Solving Sigil Puzzles

Once all eight sigil puzzles are solved, you’ll receive the Trophy of the Sigils a decorative item of accomplishment. But that’s not all…

Each of the unlocked rooms also contains Mora Jai puzzles colour-matching grid challenges that reward you with Allowance Tokens, which enhance your starting gold for future playthroughs.

What Comes Next? Eight Realms in Eight Months Puzzle

After completing the Inner Sanctum, your final challenge awaits: the Eight Realms in Eight Months puzzle.

Here’s how it works:

• Return to Room 46.
• You’ll receive a map with eight pins.
• Each pin must be placed on a realm based on clues gathered from across the estate.
• Letters, paintings, and travel logs from Herbert’s journeys provide insights into realm locations and themes.

This puzzle blends storytelling with gameplay, pushing players to recall everything they’ve learned throughout the game.

The Inner Sanctum isn’t just a side challenge it’s a gateway to mastering the mysteries of Blue Prince. Between its layered sigil puzzles, immersive world-building, and clue-hunting mechanics, it offers a brain-bending experience that blends escape room intensity with narrative depth.

If you’re exploring the mansion, pay attention to the smallest details. A stamp, a torn book page, or even a whisper of wind direction might hold the key to your next unlock.