ENObserving the all-encompassing Romanticist admiration of synaesthesia, we cannot but assume that such power and influence of synaesthesia must have root in other fundamental elements of this period. Speaking of aesthetics, the integrity of synaesthesia in Romanticism undoubtedly shows that synaesthesia was fundamentally rooted in aesthetic categories and aesthetic structures of Romanticism. Based on texts and ideas of romanticism, this article discusses the assumption that the new theory of synaesthesia and artistic practices emerged from the romantic philosophy of art. In particular, it emerged from romantic consciousness newly aware of the internal arts tectonics and their interoperability problems. The potential of the theory, artistic practice and the new problem-solving aspects of synaesthesia are rooted in the Romantic art philosophy.