Black Wall Street African-American history 24"x18" poster. Greenwood, Tulsa, Oklahoma, (aka "Black Wall Street"), home to many prominent black businessmen and location of the 1921 Terrorist Act to which racist White Americans with support from the government attacked and destroyed to what became known as, "one of the most devastating massacres in the history of US race relations". Delivery: Unframed. Comes in a mailing tube.