Bridge of Four Lions () is a 28-metre-long pedestrian bridge over the Griboedov Canal in St Petersburg, connecting L'vinyi Drive to Malaya Podyacheskaya Street. The Lion Bridge is in the Admiralteysky District of St. Petersburg, connecting the Kazansky and Spassky Islands. Its abutments are crowned with four cast iron sculptures of lions, which give the bridge its name. The structure, suspended by cables emerging from the mouths of lions, was constructed in 1825 according to the design of two well-established bridge builders, Tratter and Kristianovich. It is an outstanding monument of bridge-building architecture of the first quarter of the 19th century [5]. It is also one of the three surviving pedestrian chain bridges in St. Petersburg (along with Bank and Pochtamtsky bridges). Location It connects Lviny Lane and Malaya Podyacheskaya Street. Upstream is the Podyachsky Bridge, below the Kharlamov Bridge. The nearest metro stations (1 km) are Sadovaya, Sennaya Ploshchad, and Spasskaya. Name The Lion Bridge got its name from four cast iron sculptures of lions by the sculptor PP Sokolov, located at the corners of the bridge [6]. Until 1912, the bridge was also called Mariinsky (after the former name of Lion Lane) and Teatralny pedestrian (along Teatralnaya square located nearby). History The need to build a bridge was caused by the growth of population in the area adjacent to the Catherine Canal [9]. The bridge project was developed by the engineers Tratter and Kristianovich [10]. Simultaneously with Lvin, a project was drawn up for the second chain pedestrian bridge across the canal - Bankovsky. On February 18, 1825, both projects were approved, and the construction of the bridge began in the summer of the same year [3]. It was supposed to be completed by October of the same year, but due to a delay in the manufacture of metal parts of the bridge, assembly of the bridge began in the spring of 1826. For the construction of the bridge supports, the embankment backbone was dismantled (without dismantling the granite facing) [4]. The manufacture of cast iron and metal parts, as well as the assembly of elements at the construction site, was carried out by the Byrd plant [3]. On July 1, 1826, the bridge was opened for traffic [4]. The sculptures of lions were made by academician P.P.Sokolov. Work on the creation of the models lasted from May to September 1825, and the sculptor also made alabaster molds