The Team

Frédéric holds a Masters degree in Law and Tax Law of the Art Market from Lyon 3 University, and studied History of Art at the École du Louvre. He began his professional career in 2003 at the firm Tajan, working with the inventory department and taking part in appraisal events in France and Monaco. In 2006, he joined Christie’s Paris, where he was responsible for coordinating sales for the "Interiors" department.

He qualified as an auctioneer in 2008 and worked with an auction house in Geneva as an expert in furniture and works of art. During sales periods, he acted as auctioneer. Between events, he donned his expert hat and carried out numerous inventories at client locations where his attentiveness and the quality of his work were highly appreciated by his clients.

Since 2014, Frédéric has been a managing partner at the independent appraisal company Genève Inventaire. He is the main point of contact for private clients and organisations, offering personalised advice on the management of their collections.
His role also includes assisting notaries, bailiffs and lawyers during inventories for inheritance and division.

Telephone : +41 76 516 01 00 
Email : fcolliard@geneveinventaire.ch
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After his History of Art studies at the École du Louvre, in 2006 Herbert joined the team of specialists at an auction house based in Geneva. For ten years, he honed his expert eye on all the works of art submitted to him for examination and expanded his body of knowledge day after day.

In 2011, Herbert had the opportunity to make use of his skills in the insurance field. He joined a large international company operating in Switzerland and with great enthusiasm took care of household insurance cover and insurance for high-value objects. He was also responsible for estimating the insurance value of his clientele’s works of art and advising them in their best interests.

Since 2014, Herbert is the managing partner at the independent appraisal firm Genève Inventaire, where his role as advisor on works of art combined with his experience in insurance is highly appreciated by his clientele.

In 2020, he obtained the university diploma (DU) “Artwork appraisals” from the University of Paris II Panthéon-Assas to further his knowledge of scientific authentication techniques for works of art and of the legal developments in the field.

Telephone : +41 76 616 97 06 
Email : hhosotte@geneveinventaire.ch
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Agata Graczyk is a restorer of antique, modern and contemporary paintings, and graduated from the Institut National du Patrimoine in 2016 and from the École du Louvre specialising in Arts of the Americas in 2011. She works in museums and historic monuments as well as in her workshop in Paris's 9th arrondissement. Her skills relate to the field of conservation and restoration of painted works from condition reports to in-depth treatments, along with technological reports and advice on the management, preventative conservation, hanging and transport of works of art.

Agata regularly works for museums: the Musée d’Orsay, the Musée des Arts Décoratifs for easel paintings, and on restoration projects for large-scale wall paintings (for example, the restoration of the painted decor in the Saint-Germain-des-Prés church). She also offers her skills to renowned art galleries and private clients.

As part of her continued professional development in new restoration techniques, Agata participates in the Getty Conservation Institute's research projects under the direction of Alan Phenix on the subject of the solubility and the solvents used in restoring paintings.

In 2020, she obtained the university diploma (DU) "Artwork appraisals” from the University of Paris II Panthéon-Assas to further her scientific and legal knowledge and best serve the needs of her clients.