The National Spiritualist Association of the United States (NSAU) is an organization that promotes the practice and understanding of Spiritualism, a belief system that emphasizes communication with the spirit world. Founded in 1893, the NSAU provides resources, education, and support for Spiritualist churches and practitioners across the country. The association also hosts events, workshops, and conventions to foster community and share knowledge about mediumship, healing, and spiritual development. Through these activities, the NSAU aims to enhance the public's understanding of Spiritualism and its principles, while also advocating for the rights of Spiritualists in society.