The nature of disputes related to the in situ conservation of archaeological remains into the basements of contemporary buildings are explored in this study. Through a novel, interdisciplinary approach negotiation theories and models with heritage management practices are merged, and the concept of in situ museums (structures that conserve in situ archaeological remains) is introduced. The author discusses examples of in situ conservation of archaeological remains in contemporary private and public buildings including museums. Special emphasis is given on the Acropolis Museum which is linked with a wide range of conflicts at local, national and international level. The book concludes with a proposed strategy for managing disputes in the heritage sector.