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The Wigwam is a member of National Spiritualist Association of Churches, or NSAC.
The On-I-Set Wigwam Co-Workers Spiritualist Camp is located at Crescent Place in Onset MA, and is open for its 115th season (in 2009).
Sunday Services, which include healing, a lecture and messages are held from 10:30 a.m. - 12:00 p.m. Classes, healing shares and mediums galleries are offered in the evenings during the week, with mediums' days, workshops and fire circles on specified Saturdays and Sundays.
Services center around the Wigwam, an octagonal wooden edifice designed to resemble an Indian teepee, which has been an Onset landmark for more than a century. This is the oldest National Spiritualist Camp in the country to have religious services in this type of building. Onset was settled in 1877 by Spiritualist who formed the Onset Bay Camp Meeting Association. A movement developed in 1890 to bring the spirit of the American Indian to Onset Bay settlers. At the first meeting of the temporary organization, it was voted to call the society "The On-I-Set Wigwam Co-Workers" in honor of an old Indian Chief in this vicinity. the On-I-Set Wigwam Co-workers met as an incorporated society on October 25, 1893 and completed work on the Wigwam the following year. The Wigwam was dedicated on July 30, 1894, with the healing pole in the edifice. The Wigwam was rededicated and the pole resensitized on July 30, 1994, during the centennial observance.