Didier Marien is a recognized expert and collector in the world of textiles, he is a member of the Chambre Européenne des Experts-Conseil en Oeuvres d’Art (CECOA) and the Confederation Internationale des Négociants en Oeuvres d’Art (CINOA) and the Association of Art & Antiques Dealers (LAPADA).

In 1994, he bought Boccara gallery and developed it in various directions, mainly by constituting a collection of modern tapestries of the greatest artists of the twentieth century (Sonia Delaunay, Alexander Calder, Fernand Leger, Mathieu Matégot, Jean Lurçat, Wassily Kandinsky and Victor Vasarely, etc).

Antique tapestries still occupy a prominent place but the gallery focuses solely on the tapestries with historical and cultural importance.

In 2000, He created Boccara Design and developed a collection of artistic rugs, made with the strictest respect to weaving traditions.

He is also developing a new concept of high-end silk rugs made in the Boccara workshops, restoring modernism in the choice of colours and designs, while maintaining the “know-how” of hand weaving.

Boccara Gallery opens different spaces in major capitals such as New York, Moscow, London and Brussels.

Another department establish naturally to complete the previous collections, which is the contemporary textile sculpture (Simone Pheulpin and Benjamin Shine) or tapestry.

The gallery regularly participates in the largest international exhibitions such as Masterpiece London, LAPADA Art & Antiques Fair, PAD Paris and Fine Art Asia, etc.)