The new social circumstances have placed museums in a new, international, extremely competitive market, have created museums with different thematjc and have formed another clientele, new in quality and quantity. However, the main change, caused by the new circumstances, has been realized in the philosophy of the museums, in the new principles and methods ruling their communication with the public. This “environment” not only imposes the radical reconstruction of the museum’s mechanism and services: but it also elevates the collaboration of groups of experts, multiscientrfic education and activity of the museum’s employees, awareness of the multidimentional role of contemporary museums as well as the effort of adjustment to an essential prerequisite. These principles, however “commonplace” they may be to the personnel of foreign museums, must stop being a “utopia” for the Greek reality.