What did the case plessey v Ferguson decide?

The case Plessy v. Ferguson, decided in 1896, upheld the constitutionality of racial segregation under the "separate but equal" doctrine. The Supreme Court ruled that racial segregation did not violate the Equal Protection Clause of the Fourteenth Amendment, allowing states to maintain segregated public facilities as long as they were deemed equal. This decision legitimized many state laws that enforced racial segregation for decades, until it was eventually overturned by Brown v. Board of Education in 1954.