Fort Ancient Culture(?), Great Serpent Mound, c. 1070, Adams County, Ohio (photo: Arthur T. LaBar, CC BY-NC 2.0)
A serpent 1300 feet long
The Great Serpent Mound in rural, southwestern Ohio is the largest serpent effigy in the world. Numerous mounds were made by the ancient Native American cultures that flourished along the fertile valleys of the Mississippi, Ohio, Illinois, and Missouri Rivers a thousand years ago, though many were destroyed as farms spread across this region during the modern era. They invite us to contemplate the rich spiritual beliefs of the ancient Native American cultures that created them.
The Great Serpent Mound measures approximately 1,300 feet in length and ranges from one to three feet in height. The complex mound is both architectural and sculptural and was erected by settled peoples who cultivated maize, beans and squash and who maintained a stratified society with an organized labor force, but left no written records. Let’s take a look at both aerial and close-up views that can help us understand the mound in relationship to its site and the possible intentions of its makers.
Ephraim George Squier and E. H. Davis, “The Serpent;” entry 1014, Adams County Ohio. Pl. XXXV, Ancient monuments of the Mississippi Valley: comprising the results of extensive original surveys and explorations, Washington: Smithsonian institution, 1848
Supernatural powers?
The serpent is slightly crescent-shaped and oriented such that the head is at the east and the tail at the west, with seven winding coils in between. The shape of the head perhaps invites the most speculation. Whereas some scholars read the oval shape as an enlarged eye, others see a hollow egg or even a frog about to be swallowed by wide, open jaws. But perhaps that lower jaw is an indication of appendages, such as small arms that might imply the creature is a lizard rather than a snake. Many native cultures in both North and Central America attributed supernatural powers to snakes or reptiles and included them in their spiritual practices. The native peoples of the Middle Ohio Valley in particular frequently created snake-shapes out of copper sheets.
The mound conforms to the natural topography of the site, which is a high plateau overlooking Ohio Brush Creek. In fact, the head of the creature approaches a steep, natural cliff above the creek. The unique geologic formations suggest that a meteor struck the site approximately 250–300 million years ago, causing folded bedrock underneath the mound.
Celestial hypotheses
Aspects of both the zoomorphic form and the unusual site have associations with astronomy worthy of our consideration. The head of the serpent aligns with the summer solstice sunset, and the tail points to the winter solstice sunrise. Could this mound have been used to mark time or seasons, perhaps indicating when to plant or harvest? Likewise, it has been suggested that the curves in the body of the snake parallel lunar phases, or alternatively align with the two solstices and two equinoxes.
View of tail, Fort Ancient Culture(?), Great Serpent Mound, c. 1070, Adams County, Ohio (photo: The Last Cookie, CC BY 2.0)
Some have interpreted the egg or eye shape at the head to be a representation of the sun. Perhaps even the swallowing of the sun shape could document a solar eclipse. Another theory is that the shape of the serpent imitates the constellation Draco, with the Pole Star matching the placement of the first curve in the snake’s torso from the head. An alignment with the Pole Star may indicate that the mound was used to determine true north and thus served as a kind of compass.
Of note also is the fact that Halley’s Comet appeared in 1066, although the tail of the comet is characteristically straight rather than curved. Perhaps the mound served in part to mark this astronomical event or a similar phenomenon, such as light from a supernova. In a more comprehensive view, the serpent mount may represent a conglomerate of all celestial knowledge known by these native peoples in a single image.
Who built it?
Determining exactly which culture designed and built the effigy mound, and when, is a matter of ongoing inquiry. A broad answer may lie in viewing the work as being designed, built, and/or refurbished over an extended period of time by several Indigenous groups. The leading theory is that the Fort Ancient Culture (1000–1650 C.E.) is principally responsible for the mound, having erected it in c. 1070 C.E. This mound-building society lived in the Ohio Valley and was influenced by the contemporary Mississippian culture (700–1550), whose urban center was located at Cahokia in Illinois. The rattlesnake was a common theme among the Mississippian culture, and thus it is possible that the Fort Ancient Culture appropriated this symbol from them (although there is no clear reference to a rattle to identify the species as such).
An alternative theory is that the Fort Ancient Culture refurbished the site c. 1070, reworking a preexisting mound built by the Adena Culture (c.1100 B.C.E.–200 C.E.) and/or the Hopewell Culture (c. 100 B.C.E.–550 C.E.). Whether the site was built by the Fort Ancient peoples, or by the earlier Adena or Hopewell Cultures, the mound is atypical. The mound contains no artifacts, and both the Fort Ancient and Adena groups typically buried objects inside their mounds. Although there are no graves found inside the Great Serpent Mound, there are burials found nearby, but none of them are the kinds of burials typical for the Fort Ancient culture and are more closely associated with Adena burial practices. Archaeological evidence does not support a burial purpose for the Great Serpent Mound.
Debate continues
Whether this impressive monument was used as a way to mark time, document a celestial event, act as a compass, serve as a guide to astrological patterns, or provide a place of worship to a supernatural snake god or goddess, we may never know with certainty. One scholar has recently suggested that the mound was a platform or base for totems or other architectural structures that are no longer extant, perhaps removed by subsequent cultures. All to say, scholarly debate continues, based on on-going archaeological evidence and geological research. But without a doubt, the mound is singular and significant in its ability to provide tangible insights into the cosmology and rituals of the ancient Americas.
Additional resources
Great Serpent Mound at The Metropolitan Museum of Art’s Timeline of Art History
Serpent Mound at the Ohio Historical Society
Serpent Mound on the Ancient Ohio Trail
Source: Dr. Katherine T. Brown, “Fort Ancient Culture: Great Serpent Mound,” in Smarthistory, August 9, 2015, accessed August 20, 2024, https://smarthistory.org/fort-ancient-culture-great-serpent-mound/.
Mesa Verde
Remarkable structures in the American Southwest were home to cliff-dwelling farmers until around 1300.
Mesa Verde and the preservation of Ancestral Puebloan heritage ARCHES: At Risk Cultural Heritage Education Series. Speakers: Dr. Lauren Kilroy-Ewbank and Dr. Steven Zucker URL: https://youtu.be/ifY8gBIonAc
Wanted: stunning view
Cliff dwellings, Ancestral Puebloan, 450–1300 C.E., sandstone, Mesa Verde National Park, (photo: Steven Zucker, CC BY-NC-SA 2.0)
Imagine living in a home built into the side of a cliff. The Ancestral Puebloan peoples (formerly known as the Anasazi) did just that in some of the most remarkable structures still in existence today. Beginning after 1000–1100 C.E., they built more than 600 structures (mostly residential but also for storage and ritual) into the cliff faces of the Four Corners region of the United States (the southwestern corner of Colorado, northwestern corner of New Mexico, northeastern corner of Arizona, and southeastern corner of Utah). The dwellings depicted here are located in what is today southwestern Colorado in the national park known as Mesa Verde (“verde” is Spanish for green and “mesa” literally means table in Spanish but here refers to the flat-topped mountains common in the southwest).
Ladder to Balcony House, Mesa Verde National Park (photo: Ken Lund, CC BY-SA 2.0)
The most famous residential sites date to the twelfth and thirteenth centuries. The Ancestral Puebloans accessed these dwellings with retractable ladders, and if you are sure footed and not afraid of heights, you can still visit some of these sites in the same way today.
To access Mesa Verde National Park, you drive up to the plateau along a winding road. People come from around the world to marvel at the natural beauty of the area as well as the archaeological remains, making it a popular tourist destination.
The twelfth- and thirteenth-century structures made of stone, mortar, and plaster remain the most intact. We often see traces of the people who constructed these buildings, such as hand or fingerprints in many of the mortar and plaster walls.
View of a canyon, Mesa Verde National Park, Colorado (photo: FancyLady, CC BY-ND 2.0)
Ancestral Puebloans occupied the Mesa Verde region from about 450 C.E. to 1300 C.E. The inhabited region encompassed a far larger geographic area than is defined now by the national park, and included other residential sites like Hovenweep National Monument and Yellow Jacket Pueblo. Not everyone lived in cliff dwellings. Yellow Jacket Pueblo was also much larger than any site at Mesa Verde. It had 600–1200 rooms, and 700 people likely lived there (see link below). In contrast, only about 125 people lived in Cliff Palace (largest of the Mesa Verde sites), but the cliff dwellings are certainly among the best-preserved buildings from this time.
Cliff Palace, Ancestral Puebloan, 450–1300 C.E., sandstone, Mesa Verde National Park, Colorado (photo: Steven Zucker, CC BY-NC-SA 2.0)
Cliff palace
The largest of all the cliff dwellings, Cliff Palace, has about 150 rooms and more than twenty circular rooms. Due to its location, it was well protected from the elements. The buildings ranged from one to four stories, and some hit the natural stone “ceiling.” To build these structures, people used stone and mud mortar, along with wooden beams adapted to the natural clefts in the cliff face. This building technique was a shift from earlier structures in the Mesa Verde area, which, prior to 1000 C.E., had been made primarily of adobe (bricks made of clay, sand and straw or sticks). These stone and mortar buildings, along with the decorative elements and objects found inside them, provide important insights into the lives of the Ancestral Puebloan people during the thirteenth century.
View of Cliff Palace structures, Mesa Verde (photo: steeleman204, CC BY-NC-ND 2.0)
At sites like Cliff Palace, families lived in architectural units, organized around kivas (circular, subterranean rooms). A kiva typically had a wood-beamed roof held up by six engaged support columns made of masonry above a shelf-like banquette. Other typical features of a kiva include a firepit (or hearth), a ventilation shaft, a deflector (a low wall designed to prevent air drawn from the ventilation shaft from reaching the fire directly), and a sipapu, a small hole in the floor that is ceremonial in purpose. They developed from the pithouse, also a circular, subterranean room used as a living space.
Kiva without a roof, Cliff Palace, Mesa Verde National Park (photo: Adam Lederer, CC BY-NC-SA 2.0)
Kivas continue to be used for ceremonies today by Puebloan peoples though not those within Mesa Verde National Park. In the past, these circular spaces were likely both ceremonial and residential. If you visit Cliff Palace, you will see the kivas without their roofs (see above), but in the past they would have been covered, and the space around them would have functioned as a small plaza.
Cliff Palace plan with circular kivas, National Park Service
Connected rooms fanned out around these plazas, creating a housing unit. One room, typically facing onto the plaza, contained a hearth. Family members most likely gathered here. Other rooms located off the hearth were most likely storage rooms, with just enough of an opening to squeeze your arm through a hole to grab anything you might need. Cliff Palace also features some unusual structures, including a circular tower. Archaeologists are still uncertain as to the exact use of the tower.
Kiva at Spruce Tree House, Mesa Verde National Park (photo: Doug Kerr, CC BY-SA 2.0)
Painted murals
The builders of these structures plastered and painted murals, although what remains today is fairly fragmentary. Some murals display geometric designs, while other murals represent animals and plants.
Mural 30, Cliff Palace, Mesa Verde National Park (photo: National Park Service)
For example, Mural 30, on the third floor of a rectangular “tower” (more accurately a room block) at Cliff Palace, is painted red against a white wall. The mural includes geometric shapes that are thought to portray the landscape. It is similar to murals inside of other cliff dwellings including Spruce Tree House and Balcony House. Scholars have suggested that the red band at the bottom symbolizes the earth while the lighter portion of the wall symbolizes the sky. The top of the red band, then, forms a kind of horizon line that separates the two. We recognize what look like triangular peaks, perhaps mountains on the horizon line. The rectangular element in the sky might relate to clouds, rain or to the sun and moon. The dotted lines might represent cracks in the earth.
Mugs found at Mesa Verde (photo: by the author, Mesa Verde Museum)
The creators of the murals used paint produced from clay, organic materials, and minerals. For instance, the red color came from hematite (a red ocher). Blue pigment could be turquoise or azurite, while black was often derived from charcoal. Along with the complex architecture and mural painting, the Ancestral Puebloan peoples produced black-on-white ceramics and turquoise and shell jewelry (goods were imported from afar including shell and other types of pottery). Many of these high-quality objects and their materials demonstrate the close relationship these people had to the landscape. Notice, for example, how the geometric designs on the mugs above appear similar to those in Mural 30 at Cliff Palace.
Why build here?
From 500–1300 C.E., Ancestral Puebloans who lived at Mesa Verde were sedentary farmers and cultivated beans, squash, and corn. Corn originally came from what is today Mexico at some point during the first millennium of the Common Era. Originally most farmers lived near their crops, but this shifted in the late 1100s when people began to live near sources of water, and often had to walk longer distances to their crops.
So why move up to the cliff alcoves at all, away from water and crops? Did the cliffs provide protection from invaders? Were they defensive or were there other issues at play? Did the rock ledges have a ceremonial or spiritual significance? They certainly provide shade and protection from snow. Ultimately, we are left only with educated guesses—the exact reasons for building the cliff dwellings remain unknown to us.
Why were the cliffs abandoned?
The cliff dwellings at Mesa Verde were abandoned around 1300 C.E. After all the time and effort it took to build these beautiful dwellings, why did people leave the area? Cliff Palace was built in the twelfth century, why was it abandoned less than a hundred years later? These questions have not been answered conclusively, though it is likely that the migration from this area was due to either drought, lack of resources, violence or some combination of these. We know, for instance, that droughts occurred from 1276 to 1299. These dry periods likely caused a shortage of food and may have resulted in confrontations as resources became more scarce. The cliff dwellings remain, though, as compelling examples of how the Ancestral Puebloans literally carved their existence into the rocky landscape of today’s southwestern United States.
See also:
URL: https://youtu.be/P5K4JNthGlo
Yellow Jacket Pueblo reconstruction
Source: Dr. Lauren Kilroy-Ewbank, “Mesa Verde,” in Smarthistory, August 9, 2015, accessed July 12, 2024, https://smarthistory.org/mesa-verde-cliff-dwellings/.
Introduction to Chaco Canyon
Fajada Butte, Chaco Canyon, New Mexico. Chacoan petroglyphs can be found at the base of the cliffs (photo: Adam Meek, CC BY 2.0)
New Mexico is known as the “land of enchantment.” Among its many wonders, Chaco Canyon stands out as one of the most spectacular. Part of Chaco Culture National Historical Park, Chaco Canyon is among the most impressive archaeological sites in the world, receiving tens of thousands of visitors each year. Chaco is more than just a tourist site however, it is also sacred land. Pueblo peoples like the Hopi, Navajo, and Zuni consider it a home of their ancestors.

The canyon is vast and contains an impressive number of structures—both big and small—testifying to the incredible creativity of the people who lived in the Four Corners region of the U.S. between the 9th and 12th centuries. Chaco was the urban center of a broader world, and the ancestral Puebloans who lived here engineered striking buildings, waterways, and more.
Chaco is located in a high, desert region of New Mexico, where water is scarce. The remains of dams, canals, and basins suggest that Chacoans spent a considerable amount of their energy and resources on the control of water in order to grow crops, such as corn. Today, visitors have to imagine the greenery that would have filled the canyon.
Astronomical observations clearly played an important role in Chaco life, and they likely had spiritual significance. Petroglyphs found in Chaco Canyon and the surrounding area reveal an interest in lunar and solar cycles, and many buildings are oriented to align with winter and summer solstices.
Great Houses
“Downtown Chaco” features a number of “Great Houses” built of stone and wood. Most of these large complexes have Spanish names, given to them during expeditions, such as one sponsored by the U.S. army in 1849, led by Lt. James Simpson. Carabajal, Simpson’s guide, was Mexican, which helps to explain some of the Spanish names. Great Houses also have Navajo names, and are described in Navajo legends. Tsebida’t’ini’ani (Navajo for “covered hole”), nastl’a kin (Navajo for “house in the corner”), and Chetro Ketl (a name of unknown origin) all refer to one great house, while Pueblo Bonito (Spanish for “pretty village”) and tse biyaa anii-ahi (Navajo for “leaning rock gap”) refer to another.
Multistoried rooms, Pueblo Bonito, Chaco Canyon, New Mexico (photo: Jacqueline Poggi, CC BY-NC-ND 2.0)
Pueblo Bonito is among the most impressive of the Great Houses. It is a massive D-shaped structure that had somewhere between 600 and 800 rooms. It was multistoried, with some sections reaching as high as four stories. Some upper floors contained balconies.
There are many questions that we are still trying to answer about this remarkable site and the people who lived here. A Great House like Pueblo Bonito includes numerous round rooms, called kivas. This large architectural structure included three great kivas and thirty-two smaller kivas. Great kivas are far larger in scale than the others, and were possibly used to gather hundreds of people together. The smaller kivas likely functioned as ceremonial spaces, although they were likely multi-purpose rooms.
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Among the many remarkable features of this building are its doorways, sometimes aligned to give the impression that you can see all the way through the building. Some doorways have a T shape, and T-shaped doors are also found at other sites across the region. Research is ongoing to determine whether the T-shaped doors suggest the influence of Chaco or if the T-shaped door was a common aesthetic feature in this area, which the Chacoans then adopted.
Recently, testing of the trees (dendroprovenance) that were used to construct these massive buildings has demonstrated that the wood came from two distinct areas more than 50 miles away: one in the San Mateo Mountains, the other the Chuska Mountains. About 240,000 trees would have been used for one of the larger Great Houses.
Chacoan Cultural Interactions
Traditionally, we tend to separate Mesoamerica and the American Southwest, as if the peoples who lived in these areas did not interact. We now know this is misleading, and was not the case.
Chacoan culture expanded far beyond the confines of Chaco Canyon. Staircases leading out of the canyon allowed people to climb the mesas and access a vast network of roads that connected places across great distances, such as Great Houses in the wider region. Aztec Ruins National Monument (not to be confused with ruins that belonged to the Aztecs of Mesoamerica) in New Mexico is another ancestral Puebloan site with many of the same architectural features we see at Chaco, including a Great House and T-shaped doorways.
Cylindrical Jar from the Pueblo Bonito, Chaco Canyon, New Mexico, 3 5/8 inches in diameter (National Anthropological Archives, Smithsonian Institution)
Archaeological excavations have uncovered remarkable objects that animated Chacoan life and reveal Chaco’s interactions with peoples outside the Southwestern United States. More than 15,000 artifacts have been unearthed during different excavations at Pueblo Bonito alone, making it one of the best understood spaces at Chaco. Many of these objects speak to the larger Chacoan world, as well as Chaco’s interactions with cultures farther away. In one storage room within Pueblo Bonito, pottery sherds had traces of cacao imported from Mesoamerica. These black-and-white cylindrical vessels were likely used for drinking cacao, similar to the brightly painted Maya vessels used for a similar purpose.
The remains of scarlet macaws, birds native to an area in Mexico more than 1,000 miles away, also reveal the trade networks that existed across the Mesoamerican and Southwestern world. We know from other archaeological sites in the southwest that there were attempts to breed these colorful birds, no doubt in order to use their colorful feathers as status symbols or for ceremonial purposes. A room with a thick layer of guano (bird excrement) suggests that an aviary also existed within Pueblo Bonito. Copper bells found at Chaco also come from much further south in Mexico, once again testifying to the flourishing trade networks at this time. Chaco likely acquired these materials and objects in exchange for turquoise from their own area, examples of which can be found as far south as the Yucatan Peninsula.
Current Threats to Chaco
The world of Chaco is threatened by oil drilling and fracking. After President Theodore Roosevelt passed the Antiquities Act of 1906, Chaco was one of the first sites to be made a national monument. Chaco Canyon is also a UNESCO World Heritage Site. The Chacoan region extended far beyond this center, but unfortunately the Greater Chacoan Region does not fall under the protection of the National Park Service or UNESCO. Much of the Greater Chaco Region needs to be surveyed, because there are certainly many undiscovered structures, roads, and other findings that would help us learn more about this important culture. Beyond its importance as an extraordinary site of global cultural heritage, Chaco has sacred and ancestral significance for many Native Americans. Destruction of the Greater Chaco Region erases an important connection to the ancestral past of Native peoples, and to the present and future that belongs to all of us.
URL: https://youtu.be/DNfkBgU2ILs
Additional resources:
Chaco Canyon UNESCO World Heritage Site webpage
“Unexpected Wood Source for Chaco Canyon Great Houses” from the University of Arizona
Source: Dr. Lauren Kilroy-Ewbank, “Introduction to Chaco Canyon,” in Smarthistory, April 13, 2018, accessed August 20, 2024, https://smarthistory.org/chaco/.