Civil rights leader Dorothy Height in 2008.
Dorothy Height was president of the National Council of Negro Women for 40 years. She received the Presidential Medal of Freedom and the Congressional Gold Medal among other honors and died last year at age 98.
D.C.'s congressional delegate, Eleanor Holmes Norton, introduced the bill to rename the post office and will be on hand for Tuesday's ceremony, along with D.C. Mayor Vincent Gray and other dignitaries.
Norton calls Height "one of America's great women" and says while she was a national icon, Height was always proud to be a resident of the District.