|Location||309 Polk St., Sauk City, Wisconsin|
|Area||2 acres (0.81 ha)|
|Architect||Alfred Charles Clas|
|Architectural style||Queen Anne|
|NRHP Reference #||88000237|
|Added to NRHP||March 31, 1988|
Freethinkers` Hall, also known as "Park Hall", is a meeting hall in Sauk City, Wisconsin. Designed by Alfred Clas, Freethinkers' Hall was built in 1884 for the local Freethinkers' congregation, or Freie Gemeinde. The congregation had been formed by German immigrants in 1852, and became the last extant Freethinker' congregation in North America. It affiliated with the American Unitarian Association in 1955. The group meets in the hall to this day.
- National Park Service (2010-07-09). "National Register Information System". National Register of Historic Places. National Park Service.
- "Free Congregation of Sauk County: History of the Free Congregation of Sauk County". Free Congregation of Sauk County. Retrieved 2012-05-26.
- Goc, Michael J. (ed.) Park Hall: a Symbol of Freedom in America. Friendship, WI: New Past Press, 2004.
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