The Commandment Keepers Ethiopian Hebrew Congregation, one of the oldest and largest communities of black Hebrews in the United States, was founded in Harlem in 1919 by Rabbi Wentworth Arthur Matthew (1892-1973). Though this congregation traces its origin to the activities of those who came to New York during the first waves of black migration and immigration, it was in the post World War II years that the community took root. Rabbi Matthew created a number of auxiliary organizations, and today there are seven black synagogues in the downstate New York area that trace their origins directly to Rabbi Matthew and his congregation. The synagogue is located in Harlem.
From the description of Commandment Keepers Ethiopian Hebrew Congregation records, 1923-1991. (New York Public Library). WorldCat record id: 79431273
From the guide to the Commandment Keepers Ethiopian Hebrew Congregation records, 1923-1991, (The New York Public Library. Schomburg Center for Research in Black Culture, Manuscripts, Archives and Rare Books Division.)