"Timaeus" is a philosophical dialogue of the outstanding ancient Greek thinker Plato, which explores cosmological and metaphysical issues. In this book, the author introduces for the first time the concept of "demiurge", that is, the creator of the world, who organized matter with the help of numbers and geometry. Using mythological images and legends, Plato talks about the structure of the universe, the role of mind in nature and the eternal order of the cosmos. "Timaeus" is an important work of ancient philosophy, which became a classic and influenced the further development of scientific and philosophical concepts.