How do artists work, and what makes their work art? The exceedingly diverse answers to these questions are given in the exhibition by works from nine centuries – from Stefan Lochner to John Cage to Susanne Kümpel. From the medieval epitaph of the Cologne cathedral master Konrad Kuyn, who portrayed four Christian stone masons from antiquity in 1445, to the space-filling ball track constructed by Manos Tsangaris in 1997. Mladen Stilinović is also included, from whose work "Artist at Work" the Kolumba exhibition fittingly borrowed its title. It shows the eight-part photo series that was created in 1978 in Stilinović's Zagreb studio, depicting the artist personally "at work" – dozing in bed during the day.