Cite as: 522 U. S. 156 (1997)
Opinion of the Court
claims that "derive from a common nucleus of operative fact," such that "the relationship between [the federal] claim and the state claim permits the conclusion that the entire action before the court comprises but one constitutional 'case.' " Mine Workers v. Gibbs, 383 U. S. 715, 725 (1966); see Hurn v. Oursler, 289 U. S. 238 (1933); Siler v. Louisville & Nashville R. Co., 213 U. S. 175 (1909). Congress has codified those principles in the supplemental jurisdiction statute, which combines the doctrines of pendent and ancillary jurisdiction under a common heading. 28 U. S. C. § 1367. The statute provides, "in any civil action of which the district courts have original jurisdiction, the district courts shall have supplemental jurisdiction over all other claims that are so related to claims in the action within such original jurisdiction that they form part of the same case or controversy under Article III of the United States Constitution." § 1367(a). That provision applies with equal force to cases removed to federal court as to cases initially filed there; a removed case is necessarily one "of which the district courts . . . have original jurisdiction." See § 1441(a); Carnegie-Mellon Univ. v. Cohill, 484 U. S. 343, 350-351 (1988) (discussing pendent claims removed to federal court).
Here, once the case was removed, the District Court had original jurisdiction over ICS' claims arising under federal law, and thus could exercise supplemental jurisdiction over the accompanying state law claims so long as those claims constitute "other claims that . . . form part of the same case or controversy." § 1367(a). We think it clear that they do. The claims for review of the Commission's decisions are legal "claims," in the sense that that term is generally used in this context to denote a judicially cognizable cause of action. And the state and federal claims "derive from a common nucleus of operative fact," Gibbs, supra, at 725, namely, ICS' unsuccessful efforts to obtain demolition permits from the Chicago Landmarks Commission. That is all the statute requires to establish supplemental jurisdiction (barring an
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