Which National Historic Landmark in Oberlin, Ohio was also home to the first African American that was elected to a United States Public Office? 
John Mercer Langston House: The John Mercer Langston House is a National Historic Landmark in Oberlin, Ohio. John Mercer Langston House:  It was home to John Mercer Langston, attorney, abolitionist, diplomat, US Congressman and college president, who as town clerk in Oberlin was one of the first African Americans elected to public office in the United States. National Historic Landmark: A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance.
John Mercer Langston House