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Sullivan's Art & Museum Law Group assembles lawyers with a broad array of experience with issues affecting museums, artists, and other institutions devoted to the arts.

Our team combines skill and experience in these areas generally, with background concerning museums specifically, which together position us to understand the challenges and opportunities faced by museums, artists and collectors. Our professionals include a Best Lawyers’ Boston Non-Profit/Charities Lawyer of the Year; a former curatorial professional responsible for exhibition work and compliance with Association of Art Museum Directors provenance directives; and seasoned intellectual property litigators, among others.

Representative Client Work

  • Argued in the Supreme Court of the United States as lead counsel to plaintiffs seeking restitution of the Guelph Treasure, sold under duress by Jewish art dealers in 1935 to the Prussian government. F.R.G. v. Philipp, 141 S. Ct. 703 (2021). The case concerns the first case in which a U.S. court has found jurisdiction over a German state museum for claims to allegedly Nazi-looted art, Philipp v. F.R.G., 894 F.3d 406 (D.C. Cir. 2018).
  • Counsel of record for Mark Feldman, former U.S. Department of State Acting Legal Adviser in case concerning Nazi-forced sale of a painting by Camille Pissarro. Argued for the reversal of the ruling of the Ninth Circuit that federal common law supplied the choice of law rule in a case brought under the Foreign Sovereign Immunities Act, 28 U.S.C. § 1605(a)(3). The Supreme Court ruled for the petitioners consistent with the brief’s argument that 28 U.S.C. § 1606 compels that subsequent to finding jurisdiction, foreign sovereign defendants must stand in the same footing as any private litigant, including the choice of law. See Cassirer v. Thyssen-Bornemisza Collection Foundation, No. 20-1566, 2022 U.S. LEXIS 2097, __ S.Ct. _ (Apr. 21, 2022).
  • Represent art dealer in civil action against Poland concerning extradition attempts brought in retaliation for client's claims to recover property lost during the Holocaust. Khochinsky v. Republic of Poland, 1 F.4th 1 (D.C. Cir. 2021).
  • Counsel for heirs of renowned Berlin art dealer Alfred Flechtheim in investigation and recovery of art looted by the Nazis from the Galerie Flechtheim
  • Represent members of the Berkshire Museum in litigation concerning proposed sale of 40 works of art to fund museum operations
  • Served as lead counsel to Artmentum GmbH in widely publicized $204 million lawsuit over sale of a fine art collection, won motion to dismiss all claims in Art Assure Ltd., LLC v. Artmentum GmbH et al., Case No. 1:14-cv-03757 (LGS) (S.D.N.Y.)
  • Represented a New York art dealer in litigation involving claims for restitution of artworks alleged to have been stolen during the Nazi occupation of France. Obtained complete dismissal of all claims against client. Meyer v. University of Oklahoma Board of Regents, et al., Case No. 1:13-cv-3128 (CM)
  • Obtaining First Amendment related dismissals for speech and governance related cases
  • Advising museums and collectors concerning de-accessioning
  • Representing individuals in connection with the protection of their intellectual property rights and in negotiations with corporate sellers of their product
  • Assisting a tax-exempt organization in developing a licensing program and protecting related trademarks
  • Representing artists, authors, musicians and music producers in the negotiation of consignment, sales, and publishing contracts
  • Advising start-up companies with respect to rights clearance issues with website content and use of third-party content on the website
  • Advising clients with respect to domain name registrations, resolving domain name ownership disputes, and challenging domain name registrations that infringe client trademarks
  • Conducting nationwide intellectual property protection and enforcement programs, and handling related litigation, on behalf of, among others, Tiger Woods, Arnold Palmer, Jack Nicklaus and their licensing entities, as well as Comedy Partners (South Park), and NCP Marketing Group, Inc. (Tae Bo)
  • Defending an apparel distributor and various national and regional department store chains in connection with trademark and copyright infringement suit brought by a belt designer
  • Serving as outside general counsel to direct marketing companies, with responsibilities including day-to-day handling of all licensing, distribution and telemarketing-related agreements and principal responsibility for handling all litigation and arbitrations, including defense of class action lawsuit
  • Advising on avoiding unrelated business taxable income, including regarding gift shops, museum restaurants, corporate sponsorships, affinity credit cards and mailing lists
  • Advising on the application of sales/use tax to art work loaned to a museum
  • Negotiating settlement of use tax due on art work purchased out-of-state
  • Representing a charitable trust before highest state court and in negotiations with state Attorney General for termination of charitable trust and distribution of assets to charitable organization
  • Structuring charitable foundations and trusts for maximum tax advantage
Viewpoints
All Viewpoints
Holocaust Expropriated Art Recovery Act of 2025 Signed Into Law, Rebukes Supreme Court Ruling on Sovereign Immunity for Nazi-era Art Claims
President Donald J. Trump signed the Holocaust Expropriated Art Recovery Act of 2025 into law today, April 13, 2026. The law extends the provisions of the Holocaust Expropriated Art Recovery Act (HEAR Act) of 2016 with respect to the statute of limitations on Nazi-era art recovery claims in U.S. courts, repudiates the Supreme Court’s ruling in F.R.G. v. Philipp, 141 S. Ct. 703 (2021), and prohibits certain other defenses to such claims. I argued the Philipp case on behalf of the heirs whose ancestors were the consortium of dealers forced to sell the Welfenschatz, or Guelph Treasure, to a cabal of Nazi front men before Hermann Goering presented the collection to Hitler as a gift. Philipp held that Nazi art loss victims from Germany were not the subject of takings in violation of international law because they were “domestic takings” that thus enjoyed sovereign immunity under the Foreign Sovereign Immunities Act (FSIA). The new law is a major development that undercuts the increasingly bad-faith assertion of sovereign immunity against the heirs of Holocaust art theft victims in and since Philipp, and welcome Congressional action for which I advocated in my article last year, “Turnabout is Foul Play: Sovereign Immunity and Cultural Property Claims,” 28 Chap. L. Rev. 553 (2025). The critical aspects of the law are as follows: It extends the original HEAR Act, which nationalized the statute of limitations for Nazi-era art claims at six years from the actual discovery of the facts and circumstances necessary to bring a claim, subject to certain carveouts for previously-known claims. This replaced constructive knowledge and typical three year limits, which is the standard under most state law statutes of limitations. In contrast to the original HEAR Act’s ten-year sunset provision, the law now has no expiration. It expressly overrules Philipp, which granted sovereign immunity to Germany and its museums by importing a limitation on so-called “domestic takings” never expressed by Congress into the text of the expropriation exception in the FSIA. The result of Philipp was that heirs to the Nazis’ first art theft victims—Jews from Germany—were left without recourse. This law repudiates that ill-reasoned decision (requiring jurisdictional analysis " without regard to the nationality or citizenship of the alleged victim") and vindicates the argument that we made for our clients at the time. The law also rebukes the statements in Philipp that the 2016 HEAR Act—which opened the courthouse doors—was somehow a law primarily directed to out of court solutions, now stating unequivocally: “The intent of this Act is to permit claims to recover Nazi-looted art to be brought.” That should be clear enough. Finally, the law eliminates other potential defenses to Nazi-era claims such as laches, forum non conveniens, international comity abstention, and the Act of State Doctrine, none of which were addressed in the 2016 law. Comity abstention and the Act of State Doctrine in particular have given rise to extraordinary mischief by foreign states seeking to avoid the merits of their illicit possession of Nazi-confiscated art.     Congress Meant What it Said in 1976 About Sovereign Immunity Under the FSIA, a foreign state is immune from suit unless one of the exceptions set out in the FSIA are met. The “expropriation exception” of 28 U.S.C. § 1605(a)(3) removes sovereign immunity over claims “in which rights in property taken in violation of international law are in issue” and other commercial activity criteria are met. That exception had been understood to cover Nazi thefts of art before the Philipp court reversed course. See Cassirer v. Kingdom of Spain, 616 F.3d 1019, 1027 (9th Cir. 2010) (painting sold for paltry sum by Lilly Cassirer to finance flight of German Jew constituted taking in violation of international law); de Csepel v. Republic of Hung., 808 F. Supp. 2d 113,129-30 (D.D.C. 2011) (illegitimate acquisition Herzog collection by Hungary); Altmann v. Republic of Aus., 317 F.3d 954, 968-69 (9th Cir. 2002), aff’d in part by Republic of Aus. v. Altmann, 541 U.S. 677, 682 (2004) (the Klimt Portrait of Adele Bloch-Bauer “Woman in Gold” case); de Csepel v. Republic of Hung., 169 F.Supp.3d 143 (D.D.C. 2016); Malewicz v. City of Amsterdam, 362 F. Supp. 2d 298, 307 (D.D.C. 2005) (paintings left for safekeeping by Kazimir Malevich with custodian later persecuted by Nazis warranted later jurisdiction against current sovereign possessor of artworks); see also Berg v. King. of the Netherlands, Civil Action No.: 2:18-cv-3123-BHH, 2020 U.S. Dist. LEXIS 84489, at * 32-33 (D. S.C. Mar. 6, 2020) (“These allegations, considered in the grim context of the Nazis’ persecution of Jews during World War II, suffice to show at this juncture that the coerced sale of the Artworks was consistent with the Nazis’ pursuit of the Final Solution”). Only when the Stiftung Preussischer Kulturbesitz and the Federal Republic of Germany took a distortion-at-best view of their historic crimes (arguing such things as “the Holocaust did not begin until several years after 1935”) to defend theft from German Jews as beyond international concern did the Supreme Court decide to rewrite the FSIA—to harm German Jews’ heirs. Philipp was a textbook example of a court legislating words into a statute that Congress chose not to express. The Genocide Convention of 1948 includes property theft and was emphatically part of international law when the FSIA was passed in 1976. Hitler’s art theft was explicitly referenced in the FSIA legislative history. That genocidal property takings violate international law was sufficiently obvious that even Bavaria—by far the most recalcitrant of German federal states on Nazi-era art theft—went out of its way to concede the point in litigation. Hulton v. Bayerische Staatsgemäldesammlungen, Case No. 1:16-cv-09360-RJS, Defendants’ Memorandum of Law in Support of Their Motion to Dismiss the Complaint for Lack of Subject Matter Jurisdiction Under The FSIA [ECF No. 26] (November 15, 2017) (“the usual ‘domestic takings rule’ whereby ‘a foreign sovereign’s expropriation of its own national’s property does not violate international law’ does not apply where the foreign state is engaged in genocide. . . .”) (emphasis added). The idea that Congress meant to exclude “domestic takings” constituting genocide—a term coined to describe what was done to German Jews—from international law, but never said so, was always wrong. Indeed, barely three years before Phillip, the Supreme Court had acknowledged the longstanding principle that “there are fair arguments to be made that a sovereign’s taking of its own nationals’ property sometimes amounts to an expropriation that violates international law, and the expropriation exception provides that the general principle of immunity for these otherwise public acts should give way.” Bolivarian Republic of Venez. v. Helmerich & Payne Int’l Drilling Co., 137 S. Ct. 1312, 1316 (2017). See also Abelesz v. Magyar Nemzeti Bank, 692 F.3d 661, 675 (7th Cir. 2012) (“All U.S. courts to consider the issue recognize genocide as a violation of customary international law.”). Helmerich was decided after the 2017 denial of immunity by the District Court in Philipp (affirmed by the D.C. Circuit in 2018); that decision is even cited in Helmerich. "Sometimes" somehow became "never." Congress had made clear its view repeatedly over the years about the gravity of the Nazis’ international art crimes. See Justice for Uncompensated Survivors Today (JUST) Act, Pub. L. No. 115-171, 132 Stat. 1288 (2017); Holocaust Expropriated Art Recovery (HEAR) Act of 2016, Pub. L. No. 114-308, 130 Stat. 1524, § 4(3) (2016); Holocaust Victims Redress Act (HVRA), No. 105-158,112 Stat. 15 (1998). Most relevant, Congress adopted a definition of Nazi art theft in 2016 in the expropriation exception of the FSIA itself that necessarily includes the Nazis’ German victims from the start of their regime in 1933. Public Law No: 114-319 (12/16/2016) (emphasis added), codified as 28 U.S.C. § 1605(h)(2)(a). (“The bill denies immunity, however, in cases concerning rights in property taken in violation of international law in which the action is based upon a claim that the work was taken: (1) between January 30, 1933, and May 8, 1945, by the government of Germany. . . .”). In other words, the Supreme Court rejected in 2021 that even the greatest international property crime in history could ever violate international law when applied to the Nazis’ first victims in Germany. This about-face was astonishing and repudiated the express instructions of Congress that courts should hear these cases. Predictably, post-Philipp, victims have been turned away. See, e.g., de Csepel v. Hungary, 165 F. 4th 572 (D.C. Cir. 2026). Emboldened, Germany went so far as to argue in another case that when it invaded other countries it made those victims “German nationals” who could not now claim their property. Ambar v. Federal Republic of Germany, 596 F.Supp.3d 76, 82-83 (D.D.C. 2022). Even Spain has reversed course in trying to retain the Camille Pissarro painting taken from Lilly Cassirer in 1939 by Nazi agents. Following the Chief Justice’s lead, later decisions held that even Jews whose citizenship had been formally stripped had no recourse unless they acquired citizenship of another country. Simon v. Republic of Hung., 812 F.3d 127, 144 (D.C. Cir. 2016). That was, of course, precisely the situation Jews faced in the 1930s, either turned away or held as enemy aliens in the countries to which they escaped (including England). Just as we predicted it would, Philipp sparked a race to the bottom by unscrupulous foreign states against Holocaust victims and heirs. The post-war international order rejected that slavish adherence to nationality. The FSIA ratified that rejection in 1976, and thankfully sanity has been restored after the Supreme Court’s error. There is some final irony in the passage of the 2025 HEAR Act. In Philipp, the Chief Justice cited Banco Nacional De Cuba v. Sabbatino, 376 U.S. 398, 439 (1964) (applying the Act of State Doctrine to seizures by Communist Cuba). Although the Supreme Court’s ruling in Sabbatino was strained at best, Congress overruled it by statute shortly afterwards. See 22 U.S.C. § 2370(e) (known as the Second Hickenlooper Amendment). Referring to Sabbatino’s refusal to hear the case of expropriation by Castro’s Cuba, the Chief Justice wrote: “Congress did not applaud the Court’s reticence. [I]t passed the Second Hickenlooper Amendment to the Foreign Assistance Act of 1964.” Congress has again withheld its applause, and rightly so. Six Years and Actual Knowledge Will Remain the Test of Timeliness Until 2016, any claim to Nazi-confiscated art or forced sales in the Nazi era was typically governed by the state law statute of limitations of the forum state. These limitations periods are typically three years. Some can be extended or “equitably tolled” where the claimant could not, with the exercise of reasonable diligence, know the facts and circumstances necessary to bring a claim (like who has the property). This is a hard standard to meet, the law typically does not like old claims. Anything that put the claimant on “constructive” notice would typically bar the claim, such as when the heirs of Margarethe Mauthner sued Elizabeth Taylor (yes, that Elizabeth Taylor) for title to Vincent Van Gogh’s Vue d’asile et de la chapelle de Saint-Rémy (1889), but a 1990 auction catalogue from an unsuccessful consignment, among other things, was deemed to be constructive notice to the heirs, three years after which their claim expired. Orkin v. Taylor, 487 F.3d 734, 739 (9th Cir. 2007). The HEAR Act as passed in 2016 and now extended makes actual knowledge the standard. So, until the claimant actually knows (or unless they knew of the claim between 1999 and 2016), the claim will remain timely. Other Defenses Now Barred The defenses now forbidden by the 2025 law are the Act of State doctrine, international comity, laches, and forum non conveniens. These are all best known as prudential defenses. In other words, even if a court has jurisdiction, should it decline to exercise it? The Act of State defense generally holds that courts should not review the official acts of a foreign state. It has been abused in Nazi era cases. For example, the Ninth Circuit held that the Netherlands’ restitution to the wrong owner in the 1960s barred the claim by the rightful heirs against the Norton Simon museum. Von Saher v. Norton Simon Museum of Art, 897 F.3d 1141, 1149 (9th Cir. 2018) (restitution in 1960s by Kingdom of Netherland to George Stroganoff-Sherbatoff was official act that precluded later restitution to heirs of Jacques Goudstikker). One of those Ninth Circuit judges who was on the panel that decided the case in 2018 now sits on the Board of Trustees of that museum, incidentally. See also Emden v. Museum of Fine Arts, Houston, No. 4:21-CV-3348, 2022 WL 1307085, at *6 (S.D. Tex. May 2, 2022) (prior restitution to third party was official act precluding adjudication of present-day claim). As if that were not enough, the very generation of heroes who defeated the Nazis were emphatic that the Act of State doctrine had no place in righting the Nazis’ wrongs. On April 27, 1949, the State Department issued Press Release No. 296, entitled “Jurisdiction of United States Courts Re Suits for Identifiable Property Involved in Nazi Forced Transfers.” It stated, inter alia: As a matter of general interest, the Department publishes herewith a copy of a letter of April 13, 1949 from Jack B. Tate, Acting Legal Advisor, Department of State, to the Attorneys for the plaintiff in Civil Action No. 31-555 in the United States District Court for the Southern District of New York. The letter repeats this Government's opposition to forcible acts of dispossession of a discriminatory and confiscatory nature practiced by the Germans on the countries or peoples subject to their controls; states that it is this Government's policy to undo the forced transfers and restitute identifiable property to the victims of Nazi persecution wrongfully deprived of such property; and sets forth that the policy of the Executive, with respect to claims asserted in the United States for restitution of such property, is to relieve American courts from any restraint upon the exercise of their jurisdiction to pass upon the validity of the acts of Nazi officials. 20 Dep’t St. Bull. 573 (1949) (emphasis added). To the Supreme Court, “relieve [] any restraint” came to mean impose any restraint. International comity abstention is a different flavor of the same foul dish. Sovereign immunity itself—codified by the FSIA, originates from principles of deference between sovereign entities. Yet Germany and Hungary argued—and the Supreme Court certified questions before avoiding them—that even where the conditions of the FSIA are met that courts should nonetheless avoid cases that might be diplomatically sensitive. This argument was a perpetual heads-I-win-tails-you-lose option for foreign states, and Congress has rightly outlawed it. The HEAR Act of 2016 was originally introduced not only to extend the statute of limitations but also to bar the equitable defense of laches. That latter part was stricken from the law that passed, and courts have confirmed that the 2016 law does not bar laches. See, e.g., Zuckerman v. Metropolitan Museum of Art, 928 F.3d 186, 193–95 (2nd Cir. 2019). Like any equitable defense, laches involves consideration of the relative conduct by and prejudice to the parties involved. This law will certainly constraint the defenses of current private owners in the United States where witnesses and documents are no longer available. That cuts both ways, however, and a lack of evidence is also challenging for claimants.
How I Made Partner: 'I Developed a Strong Habit of Saying "Yes" to New Opportunities,' Says Erika Todd of Sullivan & Worcester
Erika Todd was profiled in the article "How I Made Partner: 'I Developed a Strong Habit of Saying "Yes" to New Opportunities,' Says Erika Todd of Sullivan & Worcester," published by Law.com as part of their “How I Made It Q&A Series." In the Q&A, Erika addresses a range of topics related to her professional development as a lawyer, from her years as an associate to her becoming partner at Sullivan in January 2022. She reflects on the challenges faced along her career path and offers advice  and insight about the keys to successful business development for herself and other lawyers. "The attorneys I admire most practice with creativity, integrity and humanity," she says, speaking on the impact she would like to have on the legal industry. "I want to be a model of those values for the associates I work with."
Art Trade Adjusting After US Supreme Court Struck Down Trump’s Extreme Tariffs
Nicholas O’Donnell was quoted in the article “Art trade adjusting after US Supreme Court struck down Trump’s extreme tariffs,” published by The Art Newspaper on May 1, 2026. The article explores how the art market is responding to ongoing uncertainty following the U.S. Supreme Court decision striking down Trump's tariffs (Feb. 20, 2026), which ruled that certain tariffs imposed under emergency powers were unconstitutional. Any clarity from that decision was short-lived, as new tariffs of up to 15% were introduced the same day under a different legal authority. As a result, dealers, collectors and businesses are still navigating a shifting and unpredictable trade environment. Nick noted the impact on market activity, particularly for non-exempt decorative art objects: “Many dealers made the decision not to sell things in the US.” He also addressed pricing pressures, explaining that “sellers are absorbing the costs of the tariffs and passing them on to buyers.” While the 15% tariff remains significant, he added, “Fifteen percent is a number, after all, and you can plan around it.”
Trump Signs Revised HEAR Act For Nazi-Looted Art
Nicholas O'Donnell was recently quoted in a Law360 article [sub. req’d] published April 14, 2026, titled “Trump Signs Revised HEAR Act For Nazi-Looted Art.” The article reports on the enactment of the Holocaust Expropriated Art Recovery Act of 2025, which amends the original 2016 law to establish procedures for claims seeking to recover artwork and other property lost between 1933 and 1945 due to Nazi persecution. The revised statute is intended to ensure that claims are decided on their merits rather than dismissed on technical legal grounds. The article cites Nick’s recent blog post on the Art Law Report, in which he wrote: “This replaced constructive knowledge and typical three-year limits, which is the standard under most state law statutes of limitations. In contrast to the original HEAR Act's 10-year sunset provision, the law now has no expiration.” He also wrote that the new law responds to the U.S. Supreme Court’s decision in Federal Republic of Germany v. Philipp: “The result of Philipp was that heirs to the Nazis' first art theft victims — Jews from Germany — were left without recourse. This law repudiates that ill-reasoned decision (requiring jurisdictional analysis 'without regard to the nationality or citizenship of the alleged victim') and vindicates the argument that we made for our clients at the time.”

Art & Museum Law

Art & Museum Law