What is the doctrine that was born of the Plessy vs Ferguson case known as?

The doctrine that emerged from the Plessy v. Ferguson case is known as "separate but equal." This legal principle upheld racial segregation in public facilities, asserting that as long as the separate facilities for African Americans and whites were equal in quality, segregation did not violate the Equal Protection Clause of the Fourteenth Amendment. This doctrine was later challenged and ultimately overturned by the Brown v. Board of Education decision in 1954.