Unity was founded in 1889 by Charles and Myrtle Fillmore "as a healing ministry based on the power of prayer and the power of our thoughts to create our own reality." According to Unity's website there are approximately 900 Unity Churches today.
Unity Village in Missouri has a Library and Archive. While checking out the library and archive webpage, don't forget to look at the Archive Research Guide located at the bottom of the page. One of the categories of records listed is denominational records.