The musical Middle Ages are revealed as a world of light, thought, and structured harmony, rather than an era of darkness. Listeners will learn why Boethius's ideas became important for understanding music, how notation was born, why people needed the figure of the composer, and how sound was connected to God, order, and the structure of the universe. The Middle Ages are often described through images of severity and cultural stagnation, while the history of music shows a completely different picture. It was a complex intellectual system where sound was perceived as part of the cosmic order. The conversation will help to see this period not through the stereotype of darkness, but through the search for harmony, meaning, and form. An important point will be the legacy of Boethius-a thinker whose texts influenced ideas about music for many centuries. Participants will explore why for a medieval person music was connected to mathematics, philosophy, theology, and the structure of the cosmos. We will discuss how to organize leisure in St. Petersburg.