By Livia Solaro, PhD candidate at Maastricht University, working on the transnational restitution of Nazi-looted art

On 21 February 2025, the US Supreme Court issued a ruling in Republic of Hungary v. Simon,[1] a Holocaust restitution case with a lengthy procedural history. Delivering this unanimous decision, Justice Sotomayor confirmed the restrictive approach to cases involving foreign states inaugurated in 2021 by Federal Republic of Germany v. Philipp.[2] In light of the importance of US practice for the development of customary law around sovereign immunity,[3] and its impact on questions of historical justice and transnational accountability, the Simon development deserves  particular attention. Read more