The Treaty of Nystad, also known as Freden i Nystad in Swedish, was a peace treaty between the Russian Tsardom and the Swedish Kingdom that ended the Great Northern War of 1700-1721. It was signed on August 30 (September 10) 1721 in the city of Nystad, now located in Finland and known as Uusikaupunki in Finnish and Nystad in Swedish. The treaty was signed on the Russian side by Yakov Bruce and Andrey Osterman, and on the Swedish side by Johan Liljenstedt and Otto Strömfeld.

This treaty changed the borders between Russia and Sweden, which had previously been established by the Treaty of Stolbovo in 1617. Sweden recognized the annexation of Livonia, Estonia, Ingria, part of Karelia (the so-called Old Finland), and other territories to Russia. In turn, Russia committed to returning occupied Finland to Sweden and paying monetary compensation.

The treaty was ratified on September 9 (20), and on September 10, 1721, celebrations were held in Moscow in honor of the Treaty of Nystad. The victory in the Great Northern War allowed Russia to take its place among the major European powers.

In 1726, a white marble sculptural group "Peace and Victory. Treaty of Nystad" was installed in the Summer Garden of St. Petersburg, created by the Italian sculptor P. Baratta. The naked female figure with a cornucopia and an overturned burning torch symbolizes Russia. At her feet are a shield, a cannon, and a drum, representing vigilance. Russia is crowned with a laurel wreath by the goddess of victory, Nike, holding a palm branch as a symbol of peace, and trampling a defeated lion, the heraldic symbol of Sweden. At the goddess's feet lies a Polish eagle. The lion holds a cartouche with the Latin inscription: "Great is he who gives, and he who receives. But the greatest is he who can do both."

The central figure of the cascade of fountains in Peterhof, Samson tearing the lion's mouth, also symbolizes the victory of Russian arms in the Great Northern War.