How do images and styles spread out over time and place? This article presents how art historians can use digital methods to study “visual contagions”– the visual part of globalization: how images circulate, as material artefacts (paintings, sculptures, engravings, etc.…) or in reproductions (in illustrated periodicals, in photography, or on the internet…), through which channels (cultural, geographical, political…) and according to which visual logics. It sketches the new possibilities offered by deep learning and artificial intelligence algorithms applied to images, to better understand the epidemiology of visual diffusions. This Paper is also an opportunity to assess 10 years of digital approach to artistic globalization with the Artl@s Project (https://www.artlas.huma-num.fr).



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