The court case Brown v. Board of Education overturned the "separate but equal" doctrine established by:

Shelly v. Kraemer dealt with racially restrictive covenants and the enforcement of such agreements in property sales, but it did not establish a doctrine of segregation in public facilities. While it reinforced civil rights, it was not the foundational case that supported segregation, making it an incorrect choice.

Buchanan v. Warley addressed the legality of racial segregation in housing and struck down a Louisville ordinance that enforced racial segregation in residential areas. However, it did not create a doctrine of "separate but equal" for public education, thus making it irrelevant to the question of overturning that particular doctrine.

Jones v. Mayer was significant for civil rights as it held that the Civil Rights Act of 1866 prohibited racial discrimination in the sale of property, but it did not address the educational system or the "separate but equal" doctrine. Therefore, it does not relate to the overturning of segregation in public schools.