The brick buildings of former factories have long become part of the new urban life: clusters, public spaces, and tech parks are opening in them. The lecture will help to look more closely at industrial Petersburg, understand its details, and learn the language of old masonry. Petersburg is often described through its grand facades, palaces, and recognizable styles, but the city's industrial architecture holds an equally expressive layer of history. Former factories, factory buildings, water towers, and technical structures are increasingly receiving new life: creative clusters, public spaces, and tech parks are emerging within them. The lecture will focus on brick style-a direction that is increasingly attracting the attention of city dwellers, local historians, and those who love to view the city not just through postcards. Participants will learn how this style originated, why weather conditions were important for Petersburg, what is interesting about exposed brickwork, and how utilitarian buildings transformed into notable architectural objects. Where to go in Saint Petersburg, we tell on our website.