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The Inca Khipu: Ancient Data in Knotted Strings

Although the Incas did not have a writing system, they told stories, and traditions and passed important messages orally. However, the Incas also used colorful, knotted strings known as khipus. Although the knots in these ropes represented decimal numbers, there’s a high possibility that they represented something more deep.

That’s why khipus have intrigued scholars and experts worldwide. This a proof on how creative and skilled the Inca were in managing their large and varied empire. In this article, we will take a journey through the history, structure, mystery, and legacy of khipus. 

What Exactly is a Khipu?

“Khipu” or “quipu” is a word that comes from the Quechua term for “knot.” Khipus played a crucial role in managing the vast Inca Empire from 1438 to 1533 CE. These knotted cord systems, made from cotton or camelid fibers, were fascinating: Thanks to them, the Incas recorded valuable information and could communicate without needing a written language.

The khipus were an important tool for the Inca Empire.

The knots, string colors, and arrangements of each khipu held key info,  allowing the Incas to track resources and labor, among other things. Their lightweight design made them perfect for long messages across the empire, which stretched across different South American countries, such as Peru, Ecuador, Bolivia, Chile, Argentina, and even Colombia.

What’s even more amazing is that khipus were not only important in Inca history. Evidence indicates that previous cultures, such as the Wari (500-1000 CE), also used them. Often referred to as “talking knots,” these innovative knots represent Andean civilizations’ innovation and skill in managing their large areas by combining practicality and precision.

Structure and Composition

Material: Inca people often crafted khipus from cotton or fibers from camelids like llamas and alpacas.

Colors: The cords feature a range of colors, each likely holding a special meaning. For example, red could represent warriors or work, while yellow might stand for gold or maize.

Knots: The knots are arranged using a decimal system. A group of knots may represent numbers based on where they are located on the string, much like how we use place value in math today.

Configurations: Some khipus have over a thousand cords, while others are simpler and have just a few.

Every part of a khipu—its colors, types of knots, their positions, and spacing—works together to create a rich and complex way to record information.

Khipus Functions


Khipus were more than just decorative items; The Quipus recorded key data, like censuses, harvests, taxes, and tributes. These devices had a main cord, and from it, hung other cords of different colors and with various knots. Each type of knot represented a numerical value, following a decimal system, so the Incas kept detailed control over the resources of their empire.

Accounting and Administration


As we said before, the khipus allowed the Incas to keep track of important information. For example, a farmer could use a specific cord color and a series of knots to show how much maize they contributed, making it easy to understand their tribute. 

These knotted string devices also helped track labor duties under the Mita system, which organized workers fairly and efficiently. The Inca used khipus to keep detailed records of their population. It was vital for organizing the workforce and fairly sharing resources.

Communication and Historical Records

To send messages across their vast road network, the Inca relied on chaskis , runner messengers for the Empire. These reliable inca postmen traveled with these messages. For example, in 2015, anthropologist Sabine Hyland made an exciting discovery with support from National Geographic. She found two 18th-century logosyllabic khipus in the San Juan de Collata community, a tiny town four hours from Lima. 

These khipus, which by the way were preserved with great care, probably were key in letters between local leaders during a rebellion against the Spanish. Hyland says the Collata quipus represents phonetic symbols, not alphabetic sounds. This discovery is a great chance to understand how Incas could have communicated with each other without using written records.

Deciphering the Khipus

Mathematical Encoding: Leland Locke’s early 20th-century research found that khipus used base-10. This shows the Incas’ advanced math for recording data such as taxes and resources.

Non-Numerical Uses: Anthropologist Gary Urton proposed that khipus might work like a binary code. They could encode both numbers and descriptive information. Knot patterns and colors may represent narratives, administrative details, or even ritual practices, which becomes more fascinating in this inca record system.

Spatial Distribution: This knot arrangement on the cords might reflect Inca societal hierarchies. The arrangement of knots on both the main and secondary cords might reflect relationships or hierarchies within Inca society, adding another layer of complexity to how khipus were organized and interpreted.

Researcher trying to decode a khipu.

Challenges

Destruction: During the Spanish conquest in 1532, Spaniards destroyed or lost various khipus. Since these devices were linked to Andean beliefs, and were opposed to their religious ideas or values, they systematically destroyed them. This historical event highlights the challenges faced by indigenous cultures during this period.

Deciphering Challenges: The remaining khipus do not have a direct key, like a “Rosetta Stone,” that would help us fully decode their messages. This absence makes it tough to grasp their meanings. Some of their valuable information is still a mystery.

As we said before, experts think that some khipus recorded more than just numbers, they may have encoded complex information. However, this is uncertain. Some studies suggest that khipus may have recorded historical events, expansions, or cultural practices. Knot patterns and colors are helping researchers uncover the Inca Empire’s complexity.

Khipus Modern Research

Thanks to today’s technology, recent advancements in computer algorithms and databases are revolutionizing khipu studies. Projects like the Khipu Database Project are analyzing patterns in thousands of khipus, trying to find links that will help us understand how khipus were exactly used.

The lack of records and the loss of many khipus during Spanish colonization make it hard to understand their full purpose. However, these obstacles have not stopped the quest for knowledge. Qhipus are a source of pride for Andean communities, they see khipus as a testament to their ancestors’ brilliance. 

Gary Urton, a prolific scholar specialized in Khipus.

 In some cases, khipus may have had sacred roles. For example, archaeologists found it in tombs and some say that it’s possibly linked to ceremonial or religious functions. These discoveries show us that these knotted strings were not just practical tools for recording data—they carried deep cultural and spiritual meaning.

Today’s indigenous groups are even reviving the art of making khipus to reconnect with their rich heritage.  We can affirm that quipus are a remarkable symbol of the Inca culture’s creativity and sophistication, so this is why archaeologists and anthropologists want to study them. 

The mystery continues

There are still many questions about khipus, even after extensive research. Did the Inca use them just for administration, or could they also share stories and poetry with them? What knowledge might have been lost during colonial times?  And could technology help us decode them fully in the future?

 Khipus are a wonderful example of human creativity and shows us the different ways cultures communicate. They also show us how complex and vast societies thrive without using written language. Thanks to researchers, each discovery helps us better appreciate the Inca civilization’s amazing achievements.

We’re sure that the khipus mystery piques your curiosity, so this showcases the importance of preserving the rich heritage of ancient societies. Through these knotted cords, we can connect with the past and gain valuable insights into our history.


We, Viagens Machu Picchu, encourage you to explore the mystery of khipus and more in Peru. We’ll be more than glad to explore with you all that the Andes region and Peru have to offer. Contact our experts to take the first step into your new adventure!

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