The dialogue presents a consensus regarding the inadequacies of recent museum architectural design in regard to the preservation and protection of the collections. Exhibition and circulation of collections jeopardize the permanence or life of the objects displayed. Public access is discussed. Design measures for security against theft and vandalism are assessed. The importance of specific safeguards in the storage areas is addressed. Technical priorities in showcase design include structural stability and insulation from vibrations within the building; thermal transference; spectral control of light; dust control; shelving flexibility; technical areas for buffer material and safety equipment. Travelling exhibits are particularly vulnerable to conservation and security problems. Guidelines for employing materials and techniques for better control of climatic factors in museums are provided.