AbstractThe image of the city has always been an important source and tool for defining cultural communities that dwell within. Distinctive street patterns as well as the building scenographies in different cultures and periods document the technological, economic, and cultural capacities of the cities’ inhabitants. From Aristotle’s practical philosophy up to the current tourist view of the city, where the relics of the past – cathedrals, castles, or town halls – serve as symbolic attractors, the heterogeneous image of the city reveals interesting insights into the history of civilization. Beyond the abstract data used in economic or social sciences research – numbers of inhabitants, income, productivity, and other statistical information – the image (and also the imaginaries) of the city with its high cultural complexity is a topic of research for critical art history which offers unexpected and refreshing material for a transdisciplinary dialogue on the city as the most essential form of human culture. Since the beginning of the 21 st century, the city form and image have changed considerably, in quantitative and qualitative terms. The increasing number and size of the world’s megalopolises (cities with more than 10 millions inhabitants), mainly in Latin America, Asia, and Africa, marks a new epoch of city culture with different structural and aesthetic parameters than those of traditional Old European cities.This article reviews, first, the new visual constructions of the megalopolis, second, its transformation into artistic and documentary images (photograph, film, digital art, etc.), and third, how they are catalysed into collective mental imaginaries. As an example, I examine Mexico City, a megalopolis of about 20 million inhabitants where cultural fragments of the prehispanic past, the colonial period, and the modern epoch have left their visual traces, to constitute a vital collage; one that has many contrasts as well as the occasional clash in cross-cultural processes. Supported by the recent tendencies of Bildwissenschaft (visual studies), this article tries to develop new perspectives of research on the critical phenomena at the beginning 21 st century from within the current polycentric and hyperurbanized world.