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Claimants for Claimants

About the Foundation

Providing support, expertise, and (litigation) representation regarding claims for looted art, whether or not unlawfully held or acquired by third parties, including both paintings and other property.

  • Klaas Zondervan, a man in a blue suit and polka-dot bow tie smiling at a podium, with a partially visible 'UK PROBATE SEARCH AWARDS' sign behind him.

    Klaas Zondervan

    Klaas Zondervan is a genealogist specializing in inheritance law, a NOVEX-certified executor and liquidator, and the winner of the UK Probate Research Awards 🇬🇧 – Best Human Interest Story 2023. He is also a columnist for “De Notarisklerk,” a certified English translator, and a former board member of the Dutch Association of Legal Advisors (NVRA).

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  • Portrait photo of Achim Bovelett. A man with short light brown hair, dark-framed glasses, and a goatee, wearing a dark leather jacket and black shirt, looks at the camera with a slight smile.

    Achim Bovelett, M.A.

    Achim Bovelett, M.A. has been active in provenance research since 2013, specializing in Nazi-looted art in the Dutch National Collection. He combines classical source criticism with a background in IT project management and genealogical research.

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  • Portrait photo of Marty L. Hamburger. A smiling woman with glasses in black legal robes and a white jabot stands by a waterfront. In the background, a large, modern courthouse building rises from the water under an overcast sky.

    Mr. Marty L. Hamburger

    Ms. Marty L. Hamburger began her career in the Netherlands in 1995 as an attorney specializing in maritime and fisheries law, but has also built up a diverse international practice since the 1980s, particularly through her experience as a lawyer in Switzerland. During that time, she developed a particular interest in lease law—specifically commercial leases—as…

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