MAMCO’s collection gathers more than 6,000 works (without counting editions and artists’ documents) created between the second half of 20th century and the beginning of the 21st. Half of this collection was put online in 2020. New bodies of works are added regularly, after inventory and reproduction. Two additional collections of the museum are not available online: our Concrete Poetry Fonds (based on the acquisition of Steven Leiber’s collection) and the Ecart Archives (presented as a resource and research space within the museum). Images, except for those which will be progressively replaced by better ones, are by Julien Gremaud, Ilmari Kalkkinen, and Annik Wetter. The online catalogue of MAMCO’s collection was made possible by the support of Fondation Leenaards, Loterie Romande, and Fondation Lombard Odier.