Drawing on «operative ontologies», the conference aims to explore two concrete operations: appearing and disappear­ing, with particular regard to the second. In line with the pluralization of beings, it is necessary to investigate differ­ent modes of going out of existence and out of sight and, thus, the ontological and aesthetic dimensions of disappearing. Obviously, disappearing can be a matter of passing, of destruction as well as of becoming invisible or infinitesimally small, of hiding, banishment, or of displacement. It is thus virtually impossible to think of both operations as independent from each other. Both are characterized by a liminality, raising questions of tempora­l­ity as well as spatiality: Where does something disappear to and where does it ap­pear from? Does dis/appearance unfold gradually, suddenly or tiltingly?