What relation is there between the existence of a work of art and that of a living being? Between the existence of an atom and that of a value like solidarity? These questions become our own each time a reality—whether it is a piece of music, someone we love, or a fictional character—is established and begins to take on an importance in our lives. Like William James or Gilles Deleuze, Souriau methodically defends the thesis of an existential pluralism. There are indeed different manners of existing and even different degrees or intensities of existence: from pure phenomena to objectivized things, by way of the virtual and the “super-existent,” to which works of art and the intellect, and even morality, bear witness. Existence is polyphonic, and, as a result, the world is considerably enriched and enlarged. Beyond all that exists in the ordinary sense of the term, it is necessary to allow for all sorts of virtual and ephemeral states, transitional realms, and barely begun realities, still in the making, all of which constitute so many “inter-worlds.”

Sigurd Lewerentz (1885-1975) was initially educated as mechanical engineer in Gothenburg. Yet it was his architectural apprenticeship in Munich 1909-10 that set him on his path as an architect, opening his own office in Stockholm in 1911. Although his built work is relatively small, Lewerentz is revered as one of Sweden's most eminent architects. Cemeteries and sacred buildings became a core part of Lewerentz's oeuvre, including Stockholm's South Cemetery (1914-17), Malmo Eastern Cemetery (1916), St. Mark's Church, Bjorkhagen (1956), and Petri Church, Klippan (1963). In association with Gunnar Asplund, he was also the main architect for the Stockholm International Exhibition (1930), and in collaboration with Erik Lallerstedt and David Hellden he created a masterpiece of functionalist architecture, the Malmo City Theatre (1935). Sigurd Lewerentz, Architect is a reprint of the first ever monograph on his work, originally published in English 1987 and long out of print. It tells the story of Lewerentz's life and presents his entire work in text and many photographs, drawings and plans.

Prevention is an attempt to look into the future and have a positive influence on it – therefore it is one of the most important aspects in the area of collection care, the central, current field of applied research in conservation and restoration. With sustainability damage and loss are avoided, dangers averted and research conducted. Collection care is only successful, if the theory is appropriately implemented in museum practice.