The Trinity Bridge was opened in 1903 as part of the celebrations of St. Petersburg's 200th anniversary. It was the third permanent bridge, after Blagoveshchensky Bridge and Liteiny Bridge, to be laid across the River Neva, running form just north of the Field of Mars on the left bank of the river to the Petrograd Side next to the Peter and Paul Fortress. Measuring 582 meters, it is the second longest bridge in the city, one of the busiest, and also one of the most beautiful thanks to its spectacularly ornate Art Nouveau design.

The bridge's name refers to the Trinity Cathedral, which once stood by the river on the Petrograd Side. The name was changed to Bridge of Equality in 1918, and the Cathedral was destroyed soon after. In 1934, the bridge was renamed to honor Sergei Kirov, revolutionary and Bolshevik leader of Petrograd. The original name was only restored in 1999.