Founded by Nicolas Orlowski (CEO of Artcurial) and Osanna Orlowski, the Collector Square website has been a leader in the online sale of bags, watches, jewellery, and luxury secondhand items for nearly six years. The site features an ongoing selection of nearly 15,000 appraised items ready to be shipped anywhere in the world within 24 hours.

Chosen by our experts for their quality and desirability, all items sold at Collector Square are available online and at our Paris sales locations.

Our team

Our Appraisers

Collector Square works with top specialists
recognized in their field of expertise.

Romain Réa


Expert in Horlogerie for the Paris Court of Appeal and recognized by the French Union of Experts (U.F.E.)

Cabinet Déchaut Stetten


Appraisals and auctions for jewellery, goldsmithery, watchmaking, and works of art. Déchaut Stetten is a model of excellence in the French art market.

Jérôme Lalande


Assessor in Haute Maroquinerie for the Paris Court of Appeal and a member of the French Union of Professional Experts on Works of Art and Collections (S.F.E.P.) and the French Union of Experts (U.F.E.)

Join us

We are currently looking for talent to support our development. If you want to join our team, send your CV and application letter to:

In addition to co-founders Nicolas Orlowski (CEO and founder of Artcurial) and Loïc Bocher, the Dassault Group (GIMD) supports the development of Collector Square, of which it is one of the shareholders.

Artcurial supports the development of Collector Square by sharing its expertise. Collector Square is able to offer its customers, according to the classification and the value of their objects, the best possible sales channels, whether via the Artcurial auction or via fixed price online sale on