The church commemorates the transfer of the relics of St. Prince Alexander Nevsky

The great Russian prince and defender of the Fatherland died on his way from the Horde to Gorodets on the Volga on November 14, 1263, having previously accepted the schema with the name Alexy.
On November 23 of the same year, he was buried in the cathedral church of the Vladimir Monastery of the Nativity, where a monument to him stands today.
The relics of Alexander Nevsky were discovered before the Battle of Kulikovo in 1380, at the same time a local celebration was established. Later, many Russian commanders turned to the shrine with prayers.
On August 30, 1721, Emperor Peter I concluded the Peace of Nishtadt after a long war with the Swedes. It was decided to consecrate this day by transferring the relics of the blessed Prince Alexander Nevsky from Vladimir to St. Petersburg, which was then the capital of Russia.
Taken from Vladimir on August 11, 1723, the holy relics were brought to Shlisselburg on September 20 of the same year and remained there until 1724, when on August 30 they were installed in the Trinity Cathedral of the Alexander Nevsky Lavra, where they still rest today.
By decree of September 2, 1724, the feast was established on August 30. In 1727, the festival was canceled, but in 1730 it was restored again.
Archimandrite Gabriel Buzhinsky (later Bishop of Ryazan, + April 27, 1731) composed a special service in memory of the Peace of Nishtadt, combining it with the service of St. Alexander Nevsky.
In 1743, Empress Elizabeth Petrovna established a citywide procession in St. Petersburg in memory of the transfer of the relics of the holy prince, which took place annually until 1921, when it was abolished by the Bolsheviks. Only 92 years later, in September 2013, this tradition was revived.