The racist attack on this house of worship in Birmingham, Alabama, Sunday, September 15, 1963, resulted in the death of four girls.

Answer: 16th Street Baptist Church

Context/details:

The bombing of the 16th Street Baptist Church in Birmingham was an act of terrorism by Ku Klux Klan members that killed four black girls (ages 11-14) and injured fourteen other persons at the church.

The September, 1963, bombing in Birmingham sparked the African American community into strong action in Alabama to push for the rights of black citizens. As noted in a Voting Rights Timeline provided by Alabama State University, "the murder of four black girls at the Sixteenth Street Baptist Church in Birmingham" was the catalyst that launched a "new thrust on voting rights by the Southern Christian Leadership Conference (SCLC)."