Although recent years have seen a growing philosophical interest in smell, aesthetic research on it still covers a relatively small domain, confined to a niche. The present issue deals with smell as a very serious philosophical issue, in some cases even as a vector of a whole philosophical project. The papers here collected show how olfaction, odors, fragrances and, more in general, the aerial dimension of being and knowing cover a huge range of problems that even exceeds the aesthetic domain in its conventional sense. This is why readers will not find papers written exclusively by professional philosophers, but also by curators,artists, perfumers and semiologists. The relationship between smell, cognition and aesthetic experience, the use of odors in the arts and their symbolic meanings, and the socio-ontological and socio-aesthetic engagement through the ethical and political implications of smell are some of the topics the essays tackle through different approaches and perspectives.