The article deals with the idea of introducing the term “timbrology” as a word, which most informatively renders the research processes affecting museum articles relating to history of post, postage stamps and postal stationery. Besides, the author sets the following tasks: to explain some most important timbrological and philatelic notions to a broad circle of readers; present all specific features and opportunities of «broadening» the museum space, which are associated with exhibiting philatelic items at the museums based on the activities of A.S. Popov Central Museum of Communication; and to try to substantiate the feasibility of creating a separate section of the State catalogue of Museum fund of the Russian Federation, which would be dedicated to stamps and postal stationery as unique museum articles, which have their own specific features and which have no analogs.