|Covid-19|Monarch – Gustav I
March - Treaty of Novgorod (1557)
- The Duchy of Prince John is expanded.
7 September - Duke Magnus is granted a Duchy.
- Crown Prince Eric are granted Kalmar as a fief and is installed there as governor.
Date unknown - Olaus Martini, archbishop (died 1609)
1 August - Olaus Magnus, writer and ecclesiastic (born 1490)
1 April - Mikael Agricola, Protestant reformer of Finland (born 1510)
1557 in Sweden Wikipedia
Events from the year 1557 in Sweden