
The Bielefeld Conspiracy
Published October 1, 2026
The Bielefeld Conspiracy is a satirical German internet joke claiming the city of Bielefeld does not exist and is an illusion maintained by a shadowy group called SIE (THEM). Started by a computer science student on Usenet in May 1994, it grew into one of Germany's most enduring online in-jokes and eventually forced the city itself to issue an official denial.
Overview
The joke works by inverting a standard conspiracy pitch: instead of claiming something hidden is real, it insists something obviously real is fake. Participants argue that Bielefeld, a city of roughly 340,000 people in North Rhine-Westphalia, is actually a geographic void whose existence is faked by a group known only as SIE (German for THEM)1. The three canonical questions used to test an unbeliever are: Do you know anyone from Bielefeld? Have you ever been to Bielefeld? Do you know anyone who has been to Bielefeld? Any yes answer is treated as proof the respondent is in on it3.
The humor is deadpan and self-aware, which is why it stuck with German internet users for decades. Anyone who tries to disprove it, including residents, politicians and the city's own press office, gets folded into the bit as another agent of SIE3. That recursive quality made it a running gag long after the original Usenet post dropped off the web, and it is often cited as a classic example of German internet joke culture2.
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Origin & Background
How It Spread
Timeline
Frequently Asked Questions
References (8)
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