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Text in German follows: AVERTISSEMENT Allen Liebhabern der übernatürlichen Physik wird hierdurch bekannt gemacht, daß vor ein paar Tagen der weltberühmte Zauberer Philadelphus Philadelphia, dessen schon Cardanus in seine

Lichtenberg's Avertissement

from French avertissement, meaning warning or notice

A satirical poster exposing stage magic as deception

Historical

Photo: Georg Christoph Lichtenberg, Public domain, via Wikimedia Commons

Written by Georg Christoph Lichtenberg in 1777, this poster warned citizens of Göttingen against attending a performance by Jacob Philadelphia. It used absurd claims to reveal the tricks behind what was presented as supernatural science.

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  • Written by Georg Christoph Lichtenberg in 1777
  • Targeted performer Jacob Philadelphia in Göttingen
  • Used absurd claims to expose stage magic tricks
  • Referenced by Schopenhauer in philosophical critique
  • Considered an early example of media literacy satire

What it is

Lichtenberg's Avertissement is a satirical poster written by German scholar Georg Christoph Lichtenberg in January 1777. It targeted the performer Jacob Philadelphia, who advertised his show as scientific experiments but was viewed by Lichtenberg as a display of magical tricks. The text serves as an early critique of stage illusion, using hyperbole to demonstrate how easily audiences can be misled by extravagant claims and theatrical presentation.

Where it comes from

The poster originated in Göttingen, Germany, during a period when traveling performers often blended natural philosophy with entertainment. Lichtenberg, a professor at the local university, opposed Philadelphia's arrival. He composed the warning to dissuade students and townspeople from paying for the show. The document was posted publicly to alert the community about the nature of the upcoming exhibition.

How it is done

The text employs extreme exaggeration to mock the performer's marketing. It lists impossible feats, such as moving church weather vanes without magnets or extracting teeth and firing them from a cannon. These descriptions highlight the logical gaps in the performer's promises. By presenting these absurdities as facts, Lichtenberg aimed to expose the mechanics of deception inherent in the show.

Tools and materials

The primary tool is the printed broadside itself, distributed as a public notice. The content references various props mentioned in the fictionalized performance plan, including arsenic, lead, cannons, axes, and watches. These items are described not as actual tools used by Lichtenberg, but as part of the satirical narrative designed to ridicule the performer's act.

Lichtenberg's Avertissement, drawn and placed

Emblem With the book shape. Drawn from this page, not a photograph.
  1. Living
  2. Revived
  3. Fading
  4. Historical
  5. Legendary
  6. Performed
Standing: Historical Documented in the past; no continuous living tradition today. This says whether people still do it, not whether it works.
A book with a clasp: grimoires, papyri and manuals of rites, and the learned side of magic.
Lineage
Enlightenment satire on stage magic
Where it sits The tradition it belongs to, and when it is done.

What it is for

The main goal was to protect the public from financial loss and intellectual deception. Lichtenberg sought to persuade citizens that the performance was a fraud rather than a genuine display of supernatural power. The poster also served as an educational tool, encouraging critical thinking and skepticism toward miraculous claims made by entertainers.

Who does it

Georg Christoph Lichtenberg, a physicist and satirist, authored the text. His background in science informed his skeptical approach to the performer's claims. The poster reflects the role of scholars in the Enlightenment era who questioned traditional authority and promoted rational inquiry over superstition and theatrical mystification.

Peoples and places

The work is associated with the German academic community of Göttingen. It addresses the specific cultural context of 18th-century Germany, where university professors held significant influence over public opinion. The satire resonated with those familiar with the tension between emerging scientific thought and popular entertainment forms.

At a glance: who, where and when

What people believe

The underlying worldview challenges the boundary between science and magic. Lichtenberg asserts that phenomena presented as supernatural are often merely clever manipulations. The text implies that belief in such miracles stems from a desire for wonder rather than evidence. It promotes a materialist perspective where all events have physical explanations.

When it is done

The poster was issued on January 7, 1777, just before the scheduled performances. It targeted the immediate timeframe of the event, urging people to avoid the shows on specific days. The timing was strategic, aiming to prevent ticket sales before the performer could establish a reputation in the city.

How scholars and sceptics see it

Philosopher Arthur Schopenhauer later referenced the sixth trick in his critique of Kantian philosophy. He used the example to illustrate paradoxical doctrines that gain acceptance despite their logical inconsistencies. This connection highlights the enduring impact of the satire on philosophical discourse regarding perception and reality.

Cautions and what is closed

The text warns of potential harm through deception, both financial and physical. It describes fictional scenarios involving poison and violence to emphasize the dangers of trusting unverified claims. While no actual harm occurred, the satire underscores the risks associated with blind faith in charismatic performers.

Compare and confuse

This work differs from religious warnings or moralistic tracts by focusing specifically on theatrical deception. It shares similarities with other Enlightenment critiques of superstition but uses humor and absurdity rather than direct argument. The style aligns with contemporary satirical literature that mocked charlatans and fake scientists.

Questions people ask about Lichtenberg's Avertissement

What is Lichtenberg's Avertissement?

It is a satirical poster written by Georg Christoph Lichtenberg in 1777. It warned citizens of Göttingen against attending a performance by Jacob Philadelphia, claiming the show was a deceptive magic act disguised as science.

Why was it written?

Lichtenberg wrote it to deter people from attending Philadelphia's show. He believed the performer was deceiving the audience with tricks presented as supernatural phenomena, and he wanted to expose this deception.

What kind of tricks does it describe?

The poster describes impossible feats like moving church weather vanes instantly or firing extracted teeth from a cannon. These exaggerated claims were meant to mock the performer's actual marketing and highlight the absurdity of his promises.

How is it connected to philosophy?

Arthur Schopenhauer referenced the sixth trick in his work. He used it to criticize Kantian philosophy, suggesting that some accepted doctrines are embraced simply because they offer a sense of inner comfort despite being logically paradoxical.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Lichtenberg's Avertissement", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryJaadu rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. Names and customs differ from one community to the next, and some knowledge is closed to outsiders and left out here. This page describes belief and practice. It does not say that any of it works, it is not a how-to, and it is not medical advice. If something is wrong, tell us. Last refreshed 2026-10-07.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

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