Plessy v. ferguson is a famous case because the u. s. supreme court ruled that was protected by federal law?

Plessy v. Ferguson, 163 U.S. 537 (1896), was a landmark decision of the U.S. Supreme Court issued in 1896. It upheld the constitutionality of racial segregation laws for public facilities as long as the segregated facilities were equal in quality – a doctrine that came to be known as "separate but equal".

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answer; i believe the above statement is (true);