Medicine wheels, or sacred hoops, were constructed by laying stones in a particular pattern on the ground. Most medicine wheels follow the basic pattern of having a center of stone(s), and surrounding that is an outer ring of stones with "spokes", or lines of rocks radiating from the center. Some ancient types of sacred architecture were built by laying stones on the surface of the ground in particular patterns common to aboriginal peoples. Originally, and still today, medicine wheels are stone structures constructed by certain indigenous peoples of North America for various astronomical, ritual, healing, and teaching purposes. Medicine wheels are still 'opened' or inaugurated in Native American spirituality where they are more often referred to as "sacred hoops", which is the favoured English rendering by some. There are various native words to describe the ancient forms and types of rock alignments. One teaching involves the description of the four directions. More recently, syncretic, hybridized uses of medicine wheels, magic circles, and mandala sacred technology are employed in New Age, Wiccan, Pagan and other spiritual discourse throughout the World. The rite of the sacred hoop and medicine wheel differed and differs amongst indigenous traditions, as it now does between non-indigenous peoples, and between traditional and modernist variations. The essential nature of the rite common to these divergent traditions deserves further anthropological exploration as does an exegesis of their valence.
The revisionist and culturally congruent English nomenclature 'sacred hoop'. Zotigh (2002) defines hoop in his article on Indigenous American hoop dancing:
The hoop is symbolic of "the never-ending cycle of life." It has no beginning and no end. Tribal healers and holy men have regarded the hoop as sacred and have always used it in their ceremonies. Its significance enhanced the embodiment of healing ceremonies.
The Royal Alberta Museum (2005) chart the possible point of origin and/or confluent or parallel tradition to the sacred hoop and mention tipi, stones as 'foundation stones' or 'tent-pegs', cobblestone, Plains Indians and ceremonial dance:
Scattered across the plains of Alberta are tens of thousands of stone structures. Most of these are simple circles of cobble stones which once held down the edges of the famous tipi of the Plains Indians; these are known as "tipi rings." Others, however, were of a more esoteric nature. Extremely large stone circles - some greater than 12 metres across - may be the remains of special ceremonial dance structures. A few cobble arrangements form the outlines of human figures, most of them obviously male. Perhaps the most intriguing cobble constructions, however, are the ones known as medicine wheels.
One of the prototypical medicine wheels remains within the Bighorn National Forest in Big Horn County, Wyoming. This 75 foot diameter wheel has 28 spokes, and is part of a vast set of old Native American sites that document 7,000 years of their history in that area.
Medicine wheels were commonly used by North American natives such as the Ojibwa and prehistoric ancestors of the Assiniboine.
Some locations of medicine wheels are found in the prairie regions of North America, such as Manitoba, Wyoming, Montana, Saskatchewan, and Alberta. Larger astronomical and ceremonial petroforms and Hopewell mound building can also be found in other places of North America.
John Brumley, an archaeologist from Medicine Hat, has provided a very exacting definition of what constitutes a medicine wheel. He notes that a medicine wheel consists of at least two of the following three traits: (1) a central stone cairn, (2) one or more concentric stone circles, and/or (3) two or more stone lines radiating outward from a central point.
Medicine wheels were constructed by laying stones in a particular pattern on the ground. Most medicine wheels follow the basic pattern of having a center cairn of stones, and surrounding that would be an outer ring of stones, then there would be "spokes", or lines of rocks, coming out the cairn.
Medicine wheels were built by laying out stones in a circular pattern that often looked like a wagon wheel lying on its side. The wheels could be large, reaching diameters of 75 feet. Although archeologists are not definite on the purpose of each medicine wheel, it is thought that they probably had ceremonial or astronomical significance.
Almost all medicine wheels would have at least two of the three elements mentioned above (the center cairn, the outer ring, and the spokes), but beyond that there were many variations on this basic design, and every wheel found has been unique and has had its own style and eccentricities.
The most common deviation between different wheels are the spokes. There is no set number of spokes for a medicine wheel to have. The spokes within each wheel are rarely evenly spaced out, or even all the same length. Some medicine wheels will have one particular spoke that's significantly longer than the rest, suggesting something important about the direction it points.
Another variation is whether the spokes start from the center cairn and go out only to the outer ring, or whether they go past the outer ring, or whether they start at the outer ring and go out from there.
An odd variation sometimes found in medicine wheels is the presence of a passageway, or a doorway, in the circles. The outer ring of stones will be broken, and there will be a stone path leading up to the center of the wheel.
Also many medicine wheels have various other circles around the outside of the wheel, sometimes attached to spokes or the outer ring, and sometimes just seemingly floating free of the main structure.
They are made by placing rocks down into a circle shape, and four lines or more of rocks are put down across the circle, or near the circle. Medicine wheels are used to mark the geographical directions and astronomical events of the sun, moon, some stars, and some planets in relation to the Earth's horizon at that location. These rock sites were also used for important ceremonies, teachings, and as sacred places to give thanks to the Creator, or Gitchi Manitou, known as the Great Spirit in the Ojibway native language. Other North American indigenous peoples also made these circle petroforms. Medicine wheels are very similar to circular turtle shaped petroforms with the legs, head, and tail pointing out the directions and aligned with astronomical events.
One of the older wheels has been dated to over 4,500 years old. Like Stone Henge, it had been built up by successive generations who would add new features to the circle. Due to the long existence of such a basic structure, archaeologists suspect that the function and meaning of the medicine wheel changed over time, and it is doubtful that we will ever know what the original purpose was.
Astronomer John Eddy put forth the theory that some of the wheels had astronomical significance, where the longest spoke on a wheel could be pointing to a certain star at a certain time of the year, suggesting that the wheels were a way to mark certain days of the year. Other scientists have shown that some of the wheels mark the longest day of the year.
Some Indigenous American and Canadian peoples engage the Medicine Wheel and associated rites to demonstrate the periodicity and cyclicality of Nature, change, life and lifecycles, interdependence, relationships and the Mysterium Magnum of the Earth and the Universe, amongst other teachings.
Valley City State University (2005) states that:
The Medicine Wheel’s large circle measures 213 feet around. The 28 spokes radiating from its center represent the number of days in the lunar cycle. Six spokes extending well beyond the Wheel are aligned to the horizon positions of sunrises and sunsets on the first days of the four seasons.
The medicine wheel represents the sacred circle of life, its basic four directions, and the elements. Animal totems serve as guardian of each of the directions.
Desy (2007) outlines some of the substances and fetishes engauged in the construction and opening of a sacred hoop as a personal rite of 'sacred play' such as crystals, arrowheads, seashells, feathers, animal fur and bones:
A personal medicine wheel can be made using fetishes such as crystals, arrowheads, seashells, feathers, animal fur/bones, and so on.
Lightening Woman (1999) builds a syncretic, inclusive doxology founded upon the Hopi sacred hoop of the family of Earth:
This is a Universal Medicine Wheel Teaching and is meant to show that there is ONLY ONE CREATOR GOD and ONE FAMILY OF GOD! We were placed on the Earth in Four Original Tribes and All Peaople [sic] were originally Native to the Earth. We were originally given the same teachings, with different perspectives. We all need to share our knowledge with one and other, so that we All might Grow Greater in Spirit. The Creator does not hold one Nation above another and sent messengers to All Nations. Everyone was given Medicine Wheels, Mandalas, Sacred Circle Teachings, to learn about their relationship to All Life.