In 1888, a group of individuals gathered in order to discuss a house of worship in the area of North Englewood in Chicago, Illinois. C. W. Monroe donated a cottage for use as a house of worship and services began soon after. By the following year, the small cottage had become insufficient to sit all the congregants and a new temporary place of worship was found in a nearby store. The Green Street Congregational Church became fully organized in the summer of 1889 and a new meeting house was constructed. By 1907, the congregation was again too large for its meeting house; that same year a new permanent building was built on 56th and Green Street. The building was paid for by loans and donations. The church merged to form St. Mark UCC in 1968, continuing services until closure in 1985. The materials in this collection are church reports, committee reports, and personal testimonials related to the Green Street Church and its social programs. Also included are weekly service programs, church publications, and newsletters.