Seminole Tribe of Florida v. Florida
Seminole Tribe of Florida v. Florida, 517 U.S. 44 (1996), was a United States Supreme Court case which held that Article One of the U.S. Constitution did not give the United States Congress the power to abrogate the sovereign immunity of the states that is further protected under the Eleventh Amendment.
Source: Wikipedia — Seminole Tribe of Florida v. Florida (CC BY-SA 4.0)