Observe · Regulate · Protect — since 2007. 19th OIMAP General Assembly: Singapore, 10–12 June 2026. Programme
Arbitration

States concerned by restitutions

31 States have referred cases to the TAO: regions, types of claims, role of holding States and cooperation with OIMAP.

Updated : October 28, 2026· 3 min read

A map of restitutions

Figurine (300–100 BCE)
Figurine (300–100 BCE)

Thirty-one States have brought cases to the TAO or agreed to take part in a restitution procedure. They come from every region, some as claimants, others as holders, several in both roles. This page presents the breakdown and the lessons.

The figures are indicative and anonymised by region: the names of States party to a pending case are not published without their agreement.

They illustrate the diversity of situations and the growing role of arbitration in cultural relations between States.

  • States
  • Holder
  • Applicant

States concerned by restitutions in figures

31States concerned
9Bilateral cooperation agreements
17 monthsAverage duration
58%Amicable agreements

Source: Registry of the OIMAP Arbitral Tribunal.

Breakdown

Africa29%
Asia-Pacific23%
Latin America19%
Europe19%
Middle East10%

Origin of claimant States.

Claimants and holders

Claimant States seek the return of objects that left their territory, often in colonial times, conflicts or looting. Holding States are those whose museums or public collections keep the objects. Several States occupy both positions.

Both increasingly recognise the value of a neutral procedure. National museums see it as a way of handling claims with rigour and discretion, far from controversy.

Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)
Sketches in Belgium and Germany, Volume I: Hall of Justice of the Magistrates du Franc, Bruges, Louis Haghe (1840)
Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)
Portrait of John VIII Palaoelogus, Emperor of Constantinople, 1424-1428 (reverse), Pisanello (c. 1438–1439)
The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)
The Judgment of Solomon and Esther before Ahasuerus (pair), Dirk Vellert (c. 1530)

How a State takes part

A State may take part by signing a submission agreement, by joining a clause in a bilateral agreement or by accepting a proposal from the Registry. It appoints its counsel, its representatives and, if it wishes, an arbitrator. The waiver of immunity from jurisdiction is limited to the procedure.

OIMAP offers States, especially those with few resources, technical support: model documents, training, funding assistance. A national focal point may be designated to coordinate.

Bilateral cooperation agreements

Nine bilateral agreements between States provide for recourse to the TAO for restitution disputes. They define the procedure, the timetable and the cooperation commitments (loans, training, digitisation). Others are in preparation.

These agreements facilitate the settlement of future disputes and provide a framework of trust. They are filed with the Registry and accessible to other States, subject to confidentiality.

OIMAP support for States

OIMAP offers Member States a support programme: model submission agreement, training of legal counsel, help with provenance research, putting in touch with experts. Eligible States benefit from the Protection Fund to cover part of the costs.

Requests for support are addressed to the Protection department, which forwards them to the tribunal's Registry. Exchanges remain confidential.

Indicative breakdown

Five regions
RegionStates concernedMain role
Africa9Claimants
Asia-Pacific7Claimants and holders
Latin America6Claimants
Europe6Holders
Middle East3Claimants

Milestones

  1. First referral by a State

    Pilot.

  2. Ten States

    Growing momentum.

  3. Bilateral agreements

    First texts.

  4. 31 States

    Widespread practice.

Confidentiality of States

A Philosopher, Pierre Puget (1662)
A Philosopher, Pierre Puget (1662)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
Dr. James Stuart; Mary Campbell Stuart, Gilbert Stuart (c. 1815)
The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)
The Victory Banquet: from Battle Scenes of the Quelling of Rebellions in the Western Regions, with Imperial Poems (c. 1765–74; poem dated 1760)

Claimant State or holding State

The Calumny of Apelles, Giorgio Ghisi (1560)

Applicant

Claims property
  • Must establish its link
  • May obtain technical support
  • Interest in a quick solution

Active position.

Fragment of a Wall Decoration from the Palace of Xerxes: "Guardsman" in Procession (486–465 BCE)

Holder

Keeps the property
  • Must present its titles
  • May propose a loan
  • Interest in legal clarity

Defensive position.

Taking part as a State

  1. Decide

    Policy.

  2. Appoint

    Counsel.

  3. Sign

    Compromise.

  4. Prepare

    File.

  5. Plead

    Hearing.

Preparations

A diplomat

Faience aryballos (perfume vase) (6th century BCE)
« For our two countries, recourse to arbitration was a way of dealing with a sensitive subject without turning it into a crisis. »
Ambassador L. Diop, representative of a State party

Vocabulary of States

Focal point
Designated national contact.
Bilateral agreement
Text concluded between two States.
Immunity from jurisdiction
Protection against proceedings before a court.
Holder
Party that keeps the property.

Frequently asked questions

Are the names public?

No, unless agreed.

How can a State join?

By declaration or agreement.

Does OIMAP help?

Yes, with technical support.

Where can I see the decisions?

Useful documents

Contacts

Nowshera, Kashmir (number 1000), Samuel Bourne (1864)
Nowshera, Kashmir (number 1000), Samuel Bourne (1864)
Registry of the Arbitral Tribunal (TAO)Paris — Head Office+33 1 00 00 04 00greffe.tao@oimap.exampleMonday to Friday, 9 a.m. – 5 p.m.

See the decisions

Coronation of the Virgin, Christoffel Jegher (1632–36)

Outcomes reached.

Decisions
Image credits (16)
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