ENFirst of all, the aesthetics of synaesthesia is the compilation of diverse, mostly non-historical vectors with sensory interactions, which permeate the human-made culture. In traditional aesthetics of the 19th−20th centuries, most often they are recognised in the plane of art and interactions between different types of art. Over time, it has been discovered that they cover all embedded, conscious or non-articulated vital human activities, which unfold sensorially in communication within the conditions of megasocium, which has no historical analogues. The aesthetics of synaesthesia also includes multifaceted and not necessarily homogeneous manifestations, integrated and interacting in a sensual human plane. In the traditional aesthetic thought, which prevailed almost until the end of 20th century, the programmed cases of interaction between different arts were mainly concerned with interpretations of the synaesthesia phenomenon, which showed an attempt to predispose and limit synaesthesia in the Western aesthetic tradition as yet another, even though a controversial aspect. In the 21st century, with the growing number of synaesthesia research such situation became questionable and the aesthetic articulation of synaesthesia moved not only beyond the boundaries of art, encompassing all human activity in the living world, moreover, the aesthetics of synaesthesia covered the self-perception of the individual recognising the interactions of multilayered senses in a natural and legitimate way of experiencing the world, which primarily has aesthetic value for a person.