A lecture on the connection between mathematics, geometry, and symbols, inspired by Dürer's engraving "Melencolia I". At the House of Losev, the author's lecture cycle by Viktor Troitsky "Contemplation in Forms" continues. The lecture "Forms of Number: Counting and Depicting" explores the boundaries between rational and figurative perception of the world. Various ways of understanding numbers will be presented: from the magic square in Albrecht Dürer's famous engraving "Melencolia I" to modern concepts in number systems and adeles. Listeners will learn how humans have sought not only to count but also to feel the number: to give it form, meaning, and even mystical significance over the centuries. The cycle "Contemplation in Forms" is dedicated to the history of world symbolism and its visual embodiment. Simple forms - point, circle, spiral, labyrinth - become keys to understanding philosophical, historical, and mathematical concepts. The lecture will be conducted by Viktor Troitsky, a senior researcher at the "A.F. Losev House". Additionally, visitors will be able to view the exhibition "Witness of the Century. In Memory of A.A. Taho-Godi" for free. Find other events in Moscow on KudaGo.