The Ghent Altarpiece — Decode the Mystic Lamb's Secret
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Historic center of GhentThe Ghent Altarpiece — Decode the Mystic Lamb's Secret
📍 Historic center of Ghent·🕐 2h – 2h30·📍 ~2.2 km
Also available as:HistoricalMysterySupernaturalFantasy

The Ghent Altarpiece — Decode the Mystic Lamb's Secret

Decipher the hidden symbols in Van Eyck's masterpiece before Nazi forces destroy it. Uncover the alchemical code that saved Ghent's greatest treasure during WWII.

📱 1 to 10 phones · 1 team per phone · Independent codes

Difficulty
·From age 12 years
Starting point :Castle of the Counts of Flanders

It is 1944, and the Ghent Altarpiece—the Mystic Lamb painted by Jan and Hubert van Eyck—faces annihilation

8
stages
~2.2 km
route
2h – 2h30
at your pace
🚶
walking

The Ghent Altarpiece — Decode the Mystic Lamb's Secret

🎭Your Mission

You are a detective specializing in art theft, arriving in Ghent in 1934, hot on the trail of the stolen Righteous Judges panel, commissioned by UNESCO to solve its enduring mystery.

Your

Uncover the mystery of Europe's most stolen altarpiece, Van Eyck's Mystic Lamb, whose panel remains missing since 1934.

Far more than an escape game

A game, a guided tour and a heritage guide — all in one

You're not just buying an escape game. You're carrying a living guide — historical anecdotes, forgotten legends, key monuments, hidden architecture — unfolding as you go.

🏛️
Hidden historical gems

At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.

📜
Anecdotes & legends

Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.

🏗️
Architecture & heritage

Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.

🚶‍♀️
Immersive wandering

Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.

🎙️
Immersive audio narration

A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.

📲
Yours forever

Keep access to the guide & game for 1 year. Come back any time, share it with friends.

« You will not leave this city the way you entered it. »

How does it work?

🏛️
Outdoor escape game

Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.

📱
On your smartphone

No app to download. Play directly from your browser. Guided step by step, at your own pace.

👨‍👩‍👧‍👦
Unlimited players

One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.

🎯
Augmented reality

Point your phone at the façade: a historical character appears and speaks to you in your language. Golden letters magically write themselves on the wall to reveal the puzzle answer.

🤖
AI that helps you

Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.

🗣️
32 languages

French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.

🎟️

Want to go deeper?

Places tied to your adventure — optional entries, totally up to you · per person

Ghent Museum of Fine Arts (MSK)optional
€12. Exceptional collection of Flemish primitives with Van Eyck works and technical analysis of their revolutionary pigments.
Optionnel
/pers.
Castle of the Counts - Museum of Justiceoptional
€14. Authentic medieval torture instruments and reconstruction of dungeons where Van Eycks observed the condemned.
Optionnel
/pers.
Trappist beer tasting at Dulle Grietoptional
€25. Over 500 Flemish beers in medieval setting, featuring famous Kwak served in its historic stirrup glass.
Optionnel
/pers.
Night cruise on Lys and Scheldt riversoptional
€18. 90-minute navigation with special Gothic monument lighting and commentary on 15th-century Flemish art.
Optionnel
/pers.
Budget if you do them all / pers.~0

The story that haunts this land

Your investigation begins at Gravensteen, fortress built in 1180 by Philip of Alsace as a comital prison. These 30-meter-high walls witnessed the Counts of Flanders, including Baldwin IX who resided here before departing for the Fourth Crusade in 1202. In the castle's documented dungeons, you discover the first clues: did the Van Eycks hide messages in their works to escape religious censorship? Ghent oral tradition claims the painter brothers came to observe the tortured to capture human suffering's expression, a revolutionary technique that would make their fame.

Your route leads to Saint-Bavo Cathedral, erected from 942 and completed in Gothic style around 1275. Here the Mystic Lamb has reigned since May 6, 1432, date of its solemn installation. This 11.5-meter deployed polyptych reveals Hubert and Jan van Eyck's virtuosity, but also hides mysteries: why was the Righteous Judges panel specifically targeted in the 1934 theft? Cathedral archives mention suspicious nocturnal visits by German experts in the 1930s, fueling theories of international conspiracy.

Ghent's belfry, erected between 1313 and 1338, dominates the city from 91 meters and houses the claustrum since 1377, strongroom of urban privileges. These 366 steps lead to medieval communal power's heart, where Ghent bourgeois defended their autonomy against the counts. The 54-bell carillon added in the 16th century rang to announce public executions and religious festivities. Persistent legend claims the Van Eycks painted certain Mystic Lamb faces inspired by notables glimpsed from this tower, creating a secret portrait of Ghent society.

Ghent's town hall, begun in 1482 by the Bontinck architects, testifies to Flemish wealth during Charles V's era, born in this city in 1500. Its 82-meter facade adorned with 300 statues tells local history, but in its salons the Peace of Ghent was signed December 24, 1814, ending the Anglo-American war. Municipal chronicles reveal the child emperor came to admire Van Eyck works in the neighboring cathedral, developing this taste for Flemish art he would maintain throughout his European reign.

Your investigation concludes on Saint-Michael Bridge, rebuilt in 1905 in Art Nouveau style by Louis Cloquet. This 150-meter perspective on Graslei and Korenlei quays, classified since 1942, reveals Ghent's merchant soul: here grain and beer were unloaded since the Middle Ages. Contemplating these stepped-gable facades, you understand the environment that shaped the Van Eycks: prosperous bourgeoisie, international exchanges, sophisticated urban society. The Righteous Judges enigma then makes perfect sense: this stolen panel perhaps represented this Ghent elite's faces, making its theft all the more symbolic for the city.

1500
Birth of Charles V in Ghent
1539
Start of the Ghent revolt
1540
Humiliation of the Stroppendragers

The Route

8 stages through the city

The gameplay: AR, camera, hidden clues

📱Search clues with your cameraRA

At each stop, open your phone camera: an augmented reality character appears on the façade and speaks your language. Hunt the clue — it materializes as golden letters on the real wall or floats in front of you. When you find it, the phone vibrates, an AR chest opens and reveals your answer fragment. 8 stops, 8 clues to find with the camera, 1 final code.

🎭

The stops on your route are a surprise. You'll discover them one by one, guided by your phone, starting from the meeting point.

8
original puzzles
24
min of narration
🪙 24
TripCoins granted
16
GPS waypoints

How does it work with a group?

One phone = one team. Pick the number at checkout (1 to 10).

🧍
1 phone

Solo, or a group sharing the screen. One team, one code.

👥
2-3 phones

Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.

👨‍👩‍👧‍👦
4 to 10 phones

Friends, bachelor/bachelorette, small office outing — each their own code, each plays at their own pace. Tiered pricing then €6 flat per phone from the 6th.

  • All codes are independent — play at the same time OR separately, each team advances at its own pace.
  • Leaderboard between your teams + global game leaderboard — each score appears in the public ranking.
  • More than 10 phones or need a personalized quest? Discover custom tours.
🕒No date to pick · Code valid 1 year · Play whenever you want

Ready to live this adventure?

Get my code · 12€

No calendar booking. Code sent immediately by email.

🔒 Secure payment · Code in 5 min · Free cancellation

Practical info

Starting point
Castle of the Counts of Flanders
Directions on Google Maps
🕐
Duration
2h – 2h30
At your own pace
👥
Players
Unlimited
From age 12
📍
Distance
~2.2 km
Historic center
Accessibility
Partial
Historic cobblestones
🌐
Languages
17 languages
Built-in translation

Why this route?

🎨

Van Eyck codes

Decipher secret messages hidden in primitive Flemish art

👑

Urban revolt

Relive the confrontation between the emperor and his birthplace

🔮

Medieval witchcraft

Explore witchcraft accusations linked to political resistance

Art sometimes hides the most beautiful resistance

Van Eyck and the rebels of Ghent

★ Innovation 2026

9 features nobody else has

OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.

🎁

AR treasure chest

A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.

🧙

AR narrator character

Point your phone at the façade: a knight, witch, monk, sailor, detective or ghost appears full-screen and speaks to you in your language with their dedicated ElevenLabs voice (each character has their own unique voice) — your living guide.

📜

Magic golden letters

At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.

🎧

Written + audio narration

Every puzzle available as text AND voice-over: read at your own pace or listen eyes-free while walking. Great in groups and for accessibility.

🧭

360° radar + vibration

A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.

📸

Heritage storytelling

Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.

🤖

Progressive AI hints

3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.

🤳

AR selfie memento

At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.

📱

Zero app to install

PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.

Frequently asked questions

Q01Do I need to download an app?

No, never. You get a link, you click, it plays in your browser. That's the point of a PWA: same as an app, without the hassle.

Q02Does it work offline?

GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.

Q03How long does a game take?

1 h 30 to 2 h 30 depending on your pace. The timer runs but only for the leaderboard — you play at your own tempo.

Q04What happens if I'm stuck?

You get 3 levels of hints per puzzle (increasing penalty). If truly stuck, you can skip the step (45-min penalty but you keep going).

Q05What's the age range?

From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.

Q06What if my city isn't in the catalogue?

Pre-register or contact us — we'll email you as soon as your city is live.

Q07What is augmented reality exactly?

Point your phone at the façade: a historical character appears full-screen and speaks to you in your language. At the puzzle climax, golden letters magically write themselves on the real wall — that's your answer. After each puzzle solved, a treasure chest floats in front of you. Seeing is believing.

Avis des aventuriers

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Your turn to play

Uncover the mystery of Europe's most stolen altarpiece, Van Eyck's Mystic Lamb, whose panel remains missing since 1934.

12€
1 phone
23€
2 phones
33€
3 phones
42€
4 phones
50€
5 phones
56€
6 phones
62€
7 phones
68€
8 phones
74€
9 phones
80€
10 phones

1 purchase = 1 phone. Play several on the same device.

🕒No date to pick · Code valid 1 year · Play whenever you want
Get my code · 12€

No calendar booking. Code sent immediately by email.

🔒Secure payment · Code in 5 min · Free cancellation

🪙+24 TripCoins granted with your booking

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