The First Engineer Bridge is one of several Russian bridges that span the Moika River in Saint Petersburg. The bridge is one of a group of four bridges located near the Mars Field, and opposite the main entrance to the Summer Garden, spanning the Moika River, the Fontanka River, and the Swan Canal in the historic center of the city. The First Engineer Bridge is one of the most decorative of Saint Petersburg's more than 500 bridges.
The original small wooden bridge, called the Summer Bridge and rumored to have been designed by the architect Bartolomeo Rastrelli, was built in the 1760s. This bridge was replaced with the current cast-iron bridge, in 1824-1825, and renamed the First Engineer Bridge, in 1829, after the nearby Engineers' Castle.
Wikipedia https://en.wikipedia.org/wiki/First_Engineer_Bridge
Address Инженерный 1-й мост, Санкт-Петербург 191028, Russia
Coordinates 59°56'30.387" N 30°20'16.008" E