Rationale The nuclei of galaxies are bound to be »special« places in the universe because they are located in a unique environment at the bottom of the galaxy potential. The evolution of the nuclei is closely linked to the evolution of the entire galaxy, as evidenced by a number of global-to-nucleus scaling relations discovered in the last decade. Recently, a number of studies have refocused observational interest onto the relatively new field of compact, massive, nuclear star clusters, whose presence in galaxies of all HUBBLE types has now been firmly established by recent HST studies. Historically, the nuclei of dE,N galaxies have been best studied, but it has become clear that similar objects exist also in normal spirals and ellipticals. At face value, these nuclear clusters are an intriguing environment for the formation of intermediate mass black holes because of their extreme stellar density. They may also constitute the progenitors of other massive clusters in galaxy halos. Finally, their formation process is influenced by (and important for) the central potential of their host galaxies, which is another area of ongoing debate. The aim of this workshop is to bring together scientists working in fields relevant for the understanding of these nuclei. The program is designed to review the observational and theoretical progress made in the last years, identify connections between hitherto unconnected research lines, and provide a fertile environment to develop ideas for future studies of galaxy nuclei.