A University of Vienna philosopher used ChatGPT to create a 40-minute church service, including the sermon, prayers, and music, led by four AI-generated avatars
The artificial intelligence chatbot asked the believers in the fully packed St. Paul's church in the Bavarian town of Fuerth to rise from the pews and praise the Lord.
Context & Ripple Effects
This was an early proof point in what later became a real market: the University of Vienna philosopher's fully packed AI-led service at St. Paul's in Fuerth prefigured the faith-based tech industry that religious leaders' experimentation went on to spawn, with tools for theological research and sermon-writing. It also sits in the same lineage as Stanford and Google's Smallville virtual village of chatbots — the same summer saw researchers testing whether AI agents could produce believable human behavior, here applied to liturgy instead of social simulation.
First-order effects
- The congregation in Fuerth experienced worship authored end-to-end by ChatGPT and delivered by four AI-generated avatars — a live test of whether believers accept machine-led ritual, which the full pews suggest they would at least attend.
Second-order effects
- The experiment helped normalize clergy-facing AI tooling, contributing to the demand side of the faith-tech companies now selling sermon-drafting and theological research tools to religious leaders.
Third-order effects
- The same human-likeness that made an avatar preacher plausible is the property behind documented harms: reports that ChatGPT fueled loved ones' religious delusions, and quasi-spiritual movements like Spiralism growing out of human-AI conversations — pointing toward a future where institutions must decide how much spiritual authority can be delegated to systems optimized for engagement.
The trend: Religious practice is becoming a testing ground for AI's social authority, moving from one-off experiments like this service toward commercial faith tech — and toward the psychological and doctrinal risks of machines that sound human.