The flame spared no one - neither homes, nor dreams, nor plans. A city living on the edge of fire shaped its architecture, daily life, and fear. The lecture by local historian Kirill Polezhaev is a story about how fire rewrote the fate of Petersburg, influenced laws, crafts, and even how we walk the streets today. Fire - a word that evokes anxiety even today. But in the past, it meant even more: the risk of losing everything, from home to business. For old cities, especially wooden ones, fire was not just a disaster - it was a daily reality. How did the residents of Petersburg cope with this? Why did a city built on water burn so regularly? And what exactly did we lose in the tongues of flames, and what, on the contrary, appeared thanks to the element? In the lecture by local historian and tour guide Kirill Polezhaev, we will discuss the role of fires in the city's history. You will learn how the largest fires changed urban planning, stimulated the emergence of the first professional rescuers, influenced the development of crafts and trade, dictated architectural norms and laws. We will also talk about what materials were banned for builders to use, how facades changed after each disaster, what safety rules were introduced in the 19th century, and how these laws affected the lives of ordinary citizens. The lecture is aimed at those interested in the history of Petersburg, architecture, urban transformations, and unexpected twists of fate. It is a view of the city as a living organism that grew from the ashes and moved forward again.