Expertise
Galerie de l’Institut, formerly Bouquinerie de l’Institut, has been specializing in prints by prestigious artists since 1954, and has built up a long-standing reputation in the print market, both in France and abroad. Marc and Yves Lebouc’s keen eye, research and meticulous study of subjects over many years have earned them recognition asexperts in their field, enabling them to rule on the value and authenticity of a print. Marc Lebouc is an expert before the Paris Court of Appeal, and Yves Lebouc is a member of the Compagnie Nationale des Experts.
Marc and Yves Lebouc are not just private buyers, but also colleagues from all over the world who, like us, are players in the art market, uncompromising about the quality of the works offered to the public and concerned about their ethics.
Backed by the presence of these two experts, the Galerie de l’Institut offers its customers certificates of authenticity for works purchased at the gallery, on request. Marc and Yves Lebouc are also authorized to issue certificates of authenticity for prints (etchings, lithographs, illustrated books) by Marc Chagall (see conditions of expertise below).
Expertise Chagall
Marc and Yves Lebouc are commissioned by the Comité Marc Chagall to appraise the artist’s graphic works. More than 1,000 references make up the Catalogue raisonné of lithographs, plus over a hundred illustrated books and engravings.
The Galerie de l’Institut is the only authority recognized by the Comité Marc Chagall to authenticate the artist’s prints. Copies of certificates and attestations are systematically filed with the Comité Marc Chagall for registration.
Picasso expertise
Marc and Yves Lebouc issue certificates of authenticity for prints by Pablo Picasso. More than 2,000 engravings are referenced for graphic works and 156 illustrated books.
The experts draw on all the literature in the catalogs raisonnés, but above all on their extensive technical experience and the large number of works they have studied.
Extremely meticulous in their analysis of the engravings, lithographs and linocuts presented to them, Marc and Yves Lebouc are rigorous in ensuring that any print that does not conform (by its signature, or by falsification of the original print) is listed as such.
Expertise conditions
Works submitted for appraisal must be presented in person to the experts, who will examine and verify them and then give their opinion. A certificate of authenticity or attestation is invoiced at €250 excluding VAT. In the case of works sold by the Galerie, certificates are given to the purchaser free of charge on request.
Contact
To find out more about our art gallery in Paris, the works available, our appraisal service or our exhibitions: