Trafficking in cultural property, in addition to its impact on world heritage, also represents a gigantic underground economy that plays on borders and participates in the financing of criminal and terrorist groups. For several years, the fight against trafficking in cultural property has been the subject of numerous actions to help the various actors involved in their daily work. All the actions undertaken aim to strengthen the protection of this heritage and require a different perspective based on the widest possible cooperation between the various professional players in the field of cultural heritage. At the national level, this desire to bring together police forces and archaeologists materialized in 2016 through the POLAR project. Following this cooperation, a first request was made to the ANR for MRSEI funding in order to bring this collaboration to a European level and to open it to a wider range of actors (museums, transnational organizations, non-governmental organizations ...). This funding enabled the setting up and success of two H2020 projects, NETCHER and PREVISION, launched in 2019. NETCHER has taken up the complex challenge of harmonizing and linking existing initiatives in a structured network supported by a digital collaborative platform. PREVISION project aimed to provide practitioners with advanced hardware support to analyze multiple metadata streams from diverse sources. The excellent results obtained in these two projects (creation of a network of 288 experts from 29 countries for NETCHER and setting up of a consortium of 28 entities from 13 countries for PREVISION), allow us to consider taking a new step forward. The SyNAAPTIC Tool proposal aims to benefit from the cross-fertilization of these expertises and to initiate a new consortium in the European landscape. Based on a very active relational framework, the mobilization of the different actors, the tools deployed, the use cases and the expressions of professional needs convinced us that a further step could be proposed. Its objective is to better understand the shortcomings of the systems and to fight with a set of tools available to European partners. The driving concept of the SyNAAPTIC Tool project would be the conjunction of a powerful image matching and identification tool such as PREVISION with a network of experts in the form of a modern intelligent networking platform (with indexing of expert skills). A major proposal for this call would be to centralize and standardize the European national databases of stolen cultural objects, but also the positive databases (museum, academic or informative Europeana type). This would allow to: · Centralize "object" data in a single format to promote interoperability. · Optimize research capacities (data and computing resources). · Provide police officers with a unique reference when discovering cultural artifacts. · Rapidly create corpuses of crisis zones, drawn up by teams of zone-experts. · Raise awareness among local populations as well as European citizens. We can meet these high expectations of European Law Enforcement Agencies (LEAs) by developing a specific market surveillance tool that would not only be able to regularly scan sites and catalogs, create a history of transactions but also, by programming it, analyse sales and resale cycles, distribution networks and isolate sales patterns that could lead to the identification of criminal networks and art laundering. This project should serve as a basis for future training modules for professionals involved in the fight against this traffic as well as for raising public awareness.