The lecture on chain bridges in St. Petersburg will tell how ancient engineering ideas transformed into elegant urban structures. The history of St. Petersburg's bridges is a tale of bold engineering solutions, artistic concepts, and the development of the urban environment. In the lecture, participants will learn how simple suspension crossings, which appeared centuries ago in various corners of the world, found new embodiment in the architecture of St. Petersburg. The focus will be on the city's chain bridges and the people who created these complex structures. Listeners will get acquainted with the work of engineers Wilhelm von Trettner and Vasily Christianovich, and learn how they managed to erect the Panteleimonovsky Bridge in just 18 days. A separate part of the meeting will be dedicated to the unusual details of St. Petersburg's structures. Guests will explore why the griffin sculptures on the Bank Bridge sparked debates at the Chain Bridge Commission, hear stories and legends about the collapse of the Egyptian Bridge, and discover interesting facts about the city's last chain crossing. Where to go in St. Petersburg can be found on our website.