Rosa Parks' heroic refusal to give up her bus seat to a white man is depicted in a new plaque in her honor at a city bus station.
Mrs. Parks, whose quiet stand in Montgomery, Ala., helped trigger the civil rights movement in 1955, was ill and did not attend Friday's dedication ceremony, but Mayor Richard Riordan praised her.
"Her single, profound, courageous act has made a difference for all of us," he said.
Mrs. Parks' act led to a 381-day boycott of the city's buses by blacks and a nationwide protest by the National Association for the Advancement of Colored People.