Measuring to act better

Each year, OIMAP publishes a consolidated review of its international operations. The 2024 review lists 23 coordinated operations. The cumulative total of returned works stands at 847. These figures are official; the breakdowns shown on this page are indicative.
The review is published in the first quarter of the following year, after validation by the States concerned.
It is supplemented by the details of ongoing operations and the list of partners.
Annual reviews in figures
Source: Events and Communications Directorate.
What a review contains
The review includes a statistical summary, a presentation of each completed operation, a table of returns and an analysis of trends. It also describes the difficulties encountered: procedural delays, disparities between legal systems, language barriers.
It is published in French, English and Spanish, in accessible PDF format, with a two-page summary intended for the press and the general public.



How we count
An operation is counted in the review for the year in which it was closed. A work is counted as returned only once the physical transfer has taken place and been certified by a report signed by both parties. Works that have been seized but not yet returned appear under a separate heading.
This method avoids double counting and makes years comparable. It is checked each year by an independent auditor.
Lessons of the year
Three findings emerge from the 2024 financial year. First, cooperation between administrations is all the more effective when officials know one another: operations preceded by joint training were completed more quickly. Second, the online market has become a major arena. Finally, returns are faster when provenance is well documented.
These lessons inform the following year's work programme and the Academy's training modules.
Returns in detail
Returns are classified by type of object and by region of origin. The review states the average time between seizure and handover, as well as the cases in which an amicable settlement avoided litigation. Each notable return is the subject of a short note.
Images of the returned works are available in the photo library, for editorial use with credit.
Indicators tracked
| Indicator | Definition | Frequency |
|---|---|---|
| Closed operations | Number in the year | Annual |
| Restituted works | Cumulative since inception | Annual |
| Return time | Average in months (indicative) | Annual |
| Countries involved | Participating States | Annual |
Milestones
- First public review
PDF format.
- Independent audit
Data verification.
- Public summary
Two-page version.
- 23 operations
Official figure.
Official figures



Full review or summary

Full review
Detailed report- All operations
- Method and data
- Lengthy document
For professionals.

Summary
Two pages- Key figures
- Quick reading
- Less detail
For the press and the public.
Reading a review
- Browse
The summary.
- Identify
The official figures.
- Browse
The operation notes.
- Check
The counting method.
- Cite
With the reference.
Before citing a figure
An auditor

« The crucial point is to define what is being counted. A returned work is counted only when it has been physically handed over. »
Vocabulary of reviews
- Review
- Annual document of results.
- Cumulative total
- Total since inception.
- Closing
- Official end of an operation.
- Audit
- Independent verification.
Auditing and correcting
The data are verified by an independent auditor, who checks a sample of files. If an error is found, it is corrected in a revised version published under the same reference, with a note of the correction.
States and partners may request clarification on any line of the review. The Directorate replies within thirty days.
Frequently asked questions
When is the review published?
In the following first quarter.
Is it free of charge?
Yes.
Can the data be obtained?
On reasoned request.
Where can I see what is ongoing?
See Ongoing operations.
Useful documents
Contacts

See ongoing operations
Image credits (17)
- Enjoying the Evening Cool Along the Sumida River, Kitagawa Utamaro (c. 1797–98) — Cleveland Museum of Art, CC0 1.0
- Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748) — Cleveland Museum of Art, CC0 1.0
- A Rocky Cove with Fishing Boats, Allart van Everdingen (late 1650s) — Cleveland Museum of Art, CC0 1.0
- Châteauvieux-sur-Suran, Antoine-Claude Ponthus-Cinier (1848) — Cleveland Museum of Art, CC0 1.0
- The Storm, James McNeill Whistler (1861) — Cleveland Museum of Art, CC0 1.0
- Nuova pianta di Roma data in luce da Giambattista Nolli l’anno MDCCXLVII, known as La Pianta Grande di Roma, Giovanni Battista Nolli (1748) — Cleveland Museum of Art, CC0 1.0
- The Fleet Off the Coast, Beachy Head, Samuel Atkins (c. 1790–1805) — Cleveland Museum of Art, CC0 1.0
- View of the Gulf of Pozzuoli from Solfatara, Philipp Hackert (1803) — Cleveland Museum of Art, CC0 1.0
- A Boat That Has for Sails the Wings of a Huge Bird, Filippo Morghen (about 1769) — Cleveland Museum of Art, CC0 1.0
- View of Venice, Jacopo de' Barbari (1500) — Cleveland Museum of Art, CC0 1.0
- Bridge of Shops, Srinagar, Kashmir, Samuel Bourne (1864) — Cleveland Museum of Art, CC0 1.0
- The Pyramid of Cestius, Rome, Michiel van Overbeek (c. 1650–80) — Cleveland Museum of Art, CC0 1.0
- Landscape with Saint John the Baptist, Herri met de Bles (c. 1540) — Cleveland Museum of Art, CC0 1.0
- Sailing Vessels: Armed Four-Master Putting Out to Sea, Pieter Bruegel (1561–65) — Cleveland Museum of Art, CC0 1.0
- Boating in Moonlight (1600s) — Cleveland Museum of Art, CC0 1.0
- Rue du Regard, Eugène Atget (1899) — Cleveland Museum of Art, CC0 1.0
- Temple of Athene Nike. Venus Victrix—Wingless Victory, Dimitrios Constantin (c. 1850s–60s) — Cleveland Museum of Art, CC0 1.0
Cleveland Museum of Art · CC0 1.0
International operations23 coordinated operations in 2024 and 847 works restituted: OIMAP's practical action with its partners against trafficking in cultural property.›
Ongoing operationsWhat OIMAP can say about active operations: publication principles, types of operations monitored and channels for reporting a fact.›
Operation partnersOMD, Interpol, UNESCO, ICOM: the organizations with which OIMAP cooperates, under cooperation agreements.›
Images of returned worksPhotographs of returned objects and handover ceremonies: documented records, special conditions and respect for communities.›