Since the early 19th century, African Americans have made significant contributions to Fort Greene's development. New York State outlawed slavery in 1827 and 20 years later "Coloured School No. 1," Brooklyn's first school for African-Americans, opened at the current site of the Walt Whitman Houses. Abolitionists formed the Lafayette Avenue Presbyterian Church in 1857, and hosted speakers such as Frederick Douglass and Harriet Tubman and also aided in the work of the Underground Railroad. Skilled African-American workers fought for their rights at the Navy Yard during the tumultuous Draft Riots of 1863 against armed hooligan bands. The principal of P.S. 67 in the same year was African American, and Dr. Phillip A. White became the first black member of Brooklyn's Board of Education in 1882. By 1870, more than half of the blacks in Brooklyn lived in Fort Greene, most of them north of Fort Greene Park.