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Uncover the hidden conspiracy behind Charles IV's 1356 Golden Bull decree. Decode clues at imperial landmarks to reveal a plot that threatened the Holy Roman Empire's succession.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1356, Emperor Charles IV signed the Golden Bull in Nuremberg's Imperial Castle, codifying the election of Holy Roman Emperors by seven prince-electors
You are an imperial archivist in Nuremberg in January 1356, on a secret mission for Emperor Charles IV.
He has just promulgated the Golden Bull, the fundamental decree governing emperor elections, but
Retrace the promulgation of the Golden Bull of 1356 through Nuremberg's ramparts, the imperial city where Charles IV fixed forever the election of Holy Roman Empire emperors.
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.
At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.
Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.
Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.
Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.
A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.
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. »
Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.
No app to download. Play directly from your browser. Guided step by step, at your own pace.
One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.
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.
Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.
French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.
Places tied to your adventure — optional entries, totally up to you · per person
« Die Goldene Bulle regelt die Kaiserwahl für alle Zeiten. »— Charles IV, Golden Bull, January 10, 1356
Nuremberg established itself from the 11th century as the unofficial capital of the Holy Roman Empire. The Kaiserburg, built on its 50-meter rocky spur, dominates the imperial city with three emblematic towers: Sinwell, Burggrafenburg, and Tiergärtnertor. Charles IV convened the 1356 Diet here that proclaimed the Golden Bull, constitutional text fixing seven prince-electors and codifying their privileges. In the 12th-century double Romanesque chapel, 20 meters high, 14th-century Gothic frescoes still witness these decisive assemblies where Central Europe's destiny was decided.
The imperial stables of Kaiserstallung, erected in 1495 under Maximilian I, reveal the scale of the itinerant court. This late Gothic construction with sandstone arcades could shelter 40 royal horses during imperial stays. Restored in 1950 after 1944 bombings that destroyed 80% of the historic center, it also served as lodging for dignitaries during Diets. At the Kaiserburg's foot, it materializes the complex logistics of an empire without fixed capital, where emperors governed by moving from city to city with their vast court.
Tiergärtnertorplatz square takes its name from the 14th-century fortified gate, built around 1340 in Nuremberg's 5-kilometer medieval ramparts. This former northern entrance owes its name to 16th-century imperial zoological gardens, exotic menagerie where emperors kept bears, lions and deer for ceremonial hunts. Vestiges of moats and walls, 8-12 meters high and restored in 1980, recall that Nuremberg was one of the Empire's best-defended strongholds, privileged refuge for imperial regalia for nearly four centuries.
Hauptmarkt, the 3,500-square-meter central square, has concentrated the imperial city's economic power since the 13th century. Surrounded by 15th-16th century gabled houses, it has hosted Nuremberg's famous Christmas market, the Christkindlmärkte, since 1532. The Schöner Brunnen, 19-meter Gothic fountain erected between 1385-1396, displays its 40 electro-mechanical statues since 1580. Its rotating mechanism represents the Golden Bull's seven prince-electors, perpetuating in stone and bronze the political hierarchy desired by Charles IV. The hidden Hebrew inscription discovered in 1824 — 'Zadok hat es gemacht' — reveals Jewish craftsmen's participation in this imperial work.
Your Nuremberg journey reconstructs medieval imperial power architecture. From the Altes Rathaus, built from 1332 with its underground prison where engraver Urs Graf was detained in 1524, to Saint Sebald church founded in 1225 with the patron saint's tomb and its 1440 historic organ, each monument reveals a facet of this symbolic city. Weißgerbergasse, the 15th-century tanners' street with half-timbered houses on stilts, testifies to artisanal prosperity that financed imperial grandeur. You take away understanding of a unique political system: an empire without fixed borders governed from relay cities, of which Nuremberg was the jewel for three centuries.
8 stages through the city
The gameplay: AR, camera, hidden clues
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.
One phone = one team. Pick the number at checkout (1 to 10).
Solo, or a group sharing the screen. One team, one code.
Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.
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.
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
Delve into the arcana of the Holy Roman Empire's power.
Decipher a secret document that could change history.
Understand the political stakes of Imperial Diets.
The past holds the keys to the Empire's future.
Are you ready to find them?
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
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.
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
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.
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
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.
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
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.
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).
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Pre-register or contact us — we'll email you as soon as your city is live.
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.
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Retrace the promulgation of the Golden Bull of 1356 through Nuremberg's ramparts, the imperial city where Charles IV fixed forever the election of Holy Roman Empire emperors.
1 purchase = 1 phone. Play several on the same device.
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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Unravel the clandestine plots and betrayals of the Imperial Diets that shaped the Holy Roman Empire. Decode hidden messages left by emperors and princes to expose a conspiracy threatening the realm's future.

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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
10€. Plus grand musée d'art et de culture allemande au monde avec la collection d'instruments de musique historiques de Nuremberg et les œuvres d'Albrecht Dürer.
6€. Salle d'audience historique des procès de Nuremberg de 1945-1949 où furent jugés les criminels de guerre nazis, conservée dans son état d'origine.
8€. Pain d'épices de Nuremberg IGP dans la pâtisserie Lebkuchen-Schmidt, recette inchangée depuis 1927 avec miel de Bavière et épices orientales.
7€. Réseau de caves médiévales sous la vieille ville, utilisé comme abri anti-aérien en 1944 et pour le stockage de la bière depuis le XIVe siècle.
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