The article shows that changes in the human environment associated with urbanization and scientific and technological progress have provided new opportunities and challenges for artists. Accordingly, it has given rise to new trends, for instance, the decoration of huge anthropogenic spaces, including industrial zones, city streets and squares. The art of mass actions has also flourished. The origins of all this can be seen in medieval festivals, both religious and secular (carnivals, festivals, parades, processions, etc.). However, the twentieth century gave them a special mass character, organization, technotronicity, and regularity, which allowed artists who specialize in such events to stand apart professionally. At present, the art of organizing mass actions is even taught in institutions of higher education as a separate discipline.
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