Treaty of Novgorod (1557)

It ended the Russo-Swedish War (1554–1557), a series of skirmishes in the Viborg and Oreshek areas resulting from Swedish attempts to keep Livonia, where the Teutonic Order's rule had collapsed, out of the Russian sphere of influence.

After his failure, Gustav I started negotiations for a Russo-Swedish peace with Novgorod's governor, Prince Mikhail Vasil'evich Glinsky.

In the end, Ivan IV claimed that he made an exception and allowed a Swedish delegation, led by Sten Eriksson Leijonhufvud, Gustav I's brother-in-law and Laurentius Petri, Archbishop of Uppsala, to leave Novgorod for an audience in Moscow, where they met him in person.

[3] On 2 April, in Novgorod, the treaty was put into effect by kissing the cross, following Russian tradition, as demanded by Ivan IV.

[8] Russian-Swedish relations deteriorated when prince and later king John III of Sweden married Catherine Jagellon who before had rejected Ivan IV.

[12] Magnus soon defected and Russia was defeated by Sweden and the Polish-Lithuanian Commonwealth in the Livonian War that ended with the treaty of Plussa.