Ingeborg de Jongh and Milko den Leeuw are the guiding initiators of the Authentication in Art Foundation 2012. AiA is an international platform of field-related knowledge exchange regarding authenticity of paintings. They organized the international AiA congresses in 2012, 2014, 2016, 2018, and 2021 and have worked actively on the publication of the Guidelines 'Art & Law' and 'Education'.

For more detailed information: Authentication in Art

• Research project: Natalia Goncharova & Michail Larionov
• Research project:Jurisprudence counterfeiting case 'Groninger Ploeg'
• Restoration project: de Magistraat, Gerard ter Borch


• Restoration project:The Four Evengelists, Hendrick ter Brugghen

• Restoration project: Ceilings J. De Wit, Bijbels Museum, Amsterdam

• Restoration project: Ceilings G. De Lairesse, Peace Palace, The Hague

• Research project: BMW Artcar & Artwork, Andy Warhol, New York