The Stedelijk Museum receives 500,000 visitors per year and has a staff of 190. The tasks of the conservation department are described. It is only in the last 20 years that museums of modern art all over the world are aware of the necessity of material care for the objects. The author refers to the code of ethics in the museum field. People carrying and moving objects are to be trained, the more so because modern three-dimensional sculptural art differs strongly from traditional sculpture in construction and in diversity of materials. Construction and materials of recent sculptural art are quite vulnerable, but in themselves they are important carriers of information about the artist and the creative process. The care for museum objects is a shared responsibility of personnel of all ranks. Loyalty towards the objects should be taught to every employee. This loyalty involves the observation of a number of strict rules in handling art objects: wearing gloves, picking up an object with two hands (one supporting it and the other stabilizing it) at constructionally strong parts, placing the objects in a safe way so that they cannot topple or be kicked over. Apart from caution in handling, attention should be paid to the climatic conditions during transport and at the new location. In storage rooms, objects should not stand directly on the floor. Dust coverings can cause a microclimate, hinder a quick inspection, and provoke inappropriate touching. There should be clear packing and unpacking instructions for objects to be moved from one museum to another. A video film might be useful for this. Each transport of a vulnerable object is to be accompanied by a conservator. The appropriate packing cases are to be developed in close cooperation with the technical department and the conservator. Inspection at regular intervals should give insight into the condition of the objects, which is also of importance when one has to decide about transport. Prevention is an important part of conservation.