Słowa kluczowe: Internal Market Information System, European Union, national treasures, cultural objects, international cooperation, criminality, cultural heritage, robbery, destruction, Due diligence, Directive 2014/60/EU, cultural property, burden of proof, provenance, cultural heritage law, trade, Indigenous rights, international law, Art market, economic assessment, circulation of cultural goods in the EU, international trade, cultural exception, return of cultural objects, compliance with international obligations, UNIDROIT, illicit export, restitution, Poland, Illicit traffic, Cultural objects, UNESCO, International Law, cultural goods, private international law, Cultural property, Austria, EU legislation, cultural significance, criminal liability, Netherlands, protection cultural heritage, unlawful removal, due diligence and provenance, Germany, EU, Single European Market, 1970 UNESCO Convention, import and export, return of cultural property, due diligence, Cultural heritage, free movement of goods, 1995 UNIDROIT Convention, Council Directive 93/7/EEC, movement of cultural goods, Greek implementation of Directive 2014/60/EU, illegal trade in art, unlawful movement of artefacts, illicit traffic in cultural goods, good faith acquisition, France, protection of cultural heritage