Cragin Congregational Church opened in 1883 in Chicago's North End. Throughout its history, the church remained small and recieved financial support from the City Missionary Society. This collection includes meeting minutes, the church's constitution, and financial records.

The Massachusetts Conference, United Church of Christ, began as a series of independent regional ministers’ associations. Originally these groups met to discuss matters of theology. This record group is comprised of collections that had been seprately organized and described within the Congregational Library & Archives and now is an intentional collection that fall under the umbrella of the Massachusetts Conference.