Which came first jim crow laws or in plessy v ferguson the us supreme court ruled separate but equal facilities for african-americans were constitutional?

Jim Crow laws came first, as they were enacted in the late 19th century, primarily in the 1890s, to enforce racial segregation in the Southern United States. Plessy v. Ferguson, the landmark Supreme Court case that upheld the constitutionality of racial segregation under the "separate but equal" doctrine, was decided in 1896. Therefore, the establishment of Jim Crow laws preceded the ruling in Plessy v. Ferguson.