The Exhibitium Project is a data-driven project that focuses on art exhibitions regularly held by galleries, museums and art centers. These art exhibitions are understood as complex cultural phenomena resulting from of a variety of relationships established between a set of heterogeneous actors. In order to analyze the great amount of data about temporary art exhibitions currently available on the web, Exhibitium is developing a technological tool (Expofinder) for the capture, recording and exploitation of these data, which allow us to extract new knowledge based on quantitative/qualitative parameters and to make them reusable by means of open data systems.