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| Reign | June 6, 1523–September 29 1560 (Regency from August 1521) |
| Coronation | January 12, 1528 |
| Royal Motto | Omnis potestas a Deo est (All power is of God) |
| Queens | Catherine of Saxe-Lauenburg Margareta Leijonhufvud Katarina Stenbock |
| Royal House<td>Vasa | |
| Birth<td>Probably May 12 1496 (Lindesholm, Uplandia) | |
| Death<td>September 29 1560 (Stockholm, Sweden) | |
| Place of Burial<td>Uppsala Cathedral, Uppsala | |
Gustav I of Sweden, Gustav Vasa or Gustav Eriksson Vasa (1496 - 1560), became king of Sweden in 1523 and was the first monarch of the house of Vasa. He had become regent of Sweden in 1521 after leading the rebellion against the sitting monarch of the Kalmar Union. He also introduced Protestantism in Sweden.
Gustav's first wife was Catherine of Saxe-Lauenburg (1513-1535), whom he married on 24 September 1531. They had a son:
On 1 October 1536 he married his second wife, Margareta Leijonhufvud (1514 - 1551). Their children were:
In 1552 he married his third wife, Katarina Stenbock (1535-1621).
| Preceded by: Christian II | King of Sweden | Succeeded by: Eric XIV |