The Folklorist Who Gave Fairy Tales Numbers
Cinderella is ATU 510A.
Little Red Riding Hood is ATU 333.
The numbers make the stories sound like evidence sealed inside police lockers. That was not Antti Aarne’s intention, but he did want to bring order to an enormous and unruly collection of tales.
Folklorists had gathered thousands of stories from different countries. The same basic plot could appear in Finland, Germany and Russia, but each version came with different characters, settings and details. Before researchers could properly compare them, they needed a way to determine which stories belonged together.
Aarne gave them one.
Who Was Antti Aarne?
Antti Amatus Aarne was a Finnish folklorist born in Pori in 1867. He studied at the institution now known as the University of Helsinki and completed his doctorate in 1907.
Aarne studied under Kaarle Krohn, one of the leading figures in the Finnish school of folklore research. Krohn and his father, Julius Krohn, helped develop the historic-geographic method: researchers collected as many versions of a traditional story as possible, compared their details and attempted to reconstruct how the story had changed as it moved between places.
That kind of comparison created a practical problem.
Folklore archives contained vast numbers of stories, but researchers did not have an international system for organizing them. Titles were unreliable. One collector might call a story The Magic Bird, while another filed a closely related version under The Golden Bird. Characters and objects could change even when the central plot remained recognizable.
Aarne began classifying the stories by tale type.
Aarne’s Tale-Type Index
In 1910, Aarne published Verzeichnis der Märchentypen, or Index of Folktale Types. The original work was only 63 pages long, but it became the foundation of one of folklore’s most important reference systems.
Aarne grouped tales according to their recurring plots and assigned numbers to the individual types. His major divisions included:
- Animal tales
- Ordinary folktales
- Jokes and anecdotes
Within those categories, each number represented a recognizable story pattern.
A tale type is not one official version of a story. It is a family of related versions built around a similar sequence of events.
Cinderella stories, for example, may change the heroine’s name, clothing, helper, lost object and route to marriage. The identifying structure remains: a persecuted young woman receives supernatural assistance, attends an important gathering, is recognized through a lost object and escapes her diminished position.
The number allows researchers to gather those versions together without pretending they are identical.
From Aarne to the ATU Index
Aarne did not create the modern ATU Index in its finished form.
American folklorist Stith Thompson translated and expanded Aarne’s system in 1928. He revised it again in 1961, and the resulting work became known as the Aarne–Thompson Index, sometimes abbreviated AT or AaTh.
German folklorist Hans-Jörg Uther completed another major revision in 2004. His version expanded the catalogue, corrected parts of its organization and incorporated traditions that had been poorly represented in earlier editions.
The system is now called the Aarne–Thompson–Uther Index, or ATU Index.
| Scholar | Contribution |
| Antti Aarne | Published the original tale-type index in 1910 |
| Stith Thompson | Translated and greatly expanded the system in 1928 and 1961 |
| Hans-Jörg Uther | Produced the revised international ATU Index in 2004 |
Aarne supplied the original framework. Thompson and Uther continued rebuilding it as the body of documented folklore grew.
What the Index Can—and Cannot—Tell Us
A tale-type number gives researchers a common reference point.
If two collectors identify stories as ATU 510A, they can compare those versions even if one was collected in Norway and another in India. The classification helps researchers locate related tales, follow recurring plots and explore how a story changes between languages and communities.
The number does not explain the entire story.
It cannot tell us precisely where a tale began. It does not capture every local meaning or performance. Stories may also combine elements from several types or refuse to fit cleanly into any established category.
The original index was especially dependent upon European collections. Later revisions made it more international, but no classification system can represent every storytelling tradition equally.
Aarne created a map. He did not mistake the map for the territory.
Antti Aarne Versus Vladimir Propp
Aarne and Vladimir Propp both looked for patterns in folktales, but they organized those patterns differently.
Aarne classified whole plots. He asked which recorded stories belonged to the same tale family.
Propp broke stories into narrative functions. He asked what particular actions—departure, prohibition, trickery, testing or rescue—were doing inside the tale.
| Antti Aarne | Vladimir Propp |
| Classified recurring tale types | Identified recurring narrative functions |
| Compared complete plots | Examined sequences of actions |
| Created a reference catalogue | Developed a structural analysis |
| Helped researchers locate related stories | Helped researchers examine how stories work |
Aarne might place several Cinderella variants under the same number. Propp would open those stories and examine the actions moving beneath their different surfaces.
The methods are not interchangeable, but they can be used together.
Does Aarne’s System Apply to Urban Legends?
Not directly.
Aarne designed his index primarily for traditional folktales. Urban legends have their own catalogues, themes and methods of classification. They also change quickly in response to current technologies, news events and social fears.
His underlying idea still matters.
When we place several versions of the Vanishing Hitchhiker beside one another, we are making an Aarne-like decision: these accounts differ, but they appear to belong to the same story family.
The classification does not prove that the hitchhiker existed. It helps us see which parts of the legend survive as names, roads and witnesses change.
Before a story can be traced, its relatives must be recognized.
Aarne helped give folklorists a way to find them.
Frequently Asked Questions
Who was Antti Aarne?
Antti Aarne was a Finnish folklorist best known for publishing the first international tale-type index in 1910. His classification system became the foundation of the modern Aarne–Thompson–Uther Index.
What did Antti Aarne create?
Aarne created a numbered system for grouping folktales with similar plots. Instead of treating every version as an unrelated story, researchers could identify it as part of a larger tale type.
What does ATU stand for?
ATU stands for Antti Aarne, Stith Thompson and Hans-Jörg Uther—the three folklorists most closely associated with the development and revision of the international tale-type index.
Did Antti Aarne create all the current ATU numbers?
No. Aarne created the original system, but Stith Thompson and Hans-Jörg Uther later translated, expanded and reorganized it. The current ATU Index is the result of all three scholars’ work.
Why is Antti Aarne important?
Aarne gave folklore researchers a shared language for identifying related stories. His system made large-scale comparison possible and remains the foundation of folktale classification more than a century later.
Sources and Further Reading
- Aarne, Antti. Verzeichnis der Märchentypen. Folklore Fellows’ Communications no. 3, 1910.
- University of Helsinki. “Antti Aarne.”
- Aarne, Antti, and Stith Thompson. The Types of the Folk-Tale: A Classification and Bibliography. Second revision, Folklore Fellows’ Communications no. 184, 1961.
- Uther, Hans-Jörg. The Types of International Folktales: A Classification and Bibliography. Folklore Fellows’ Communications nos. 284–286, 2004.