Tre Kronor. Tre Kronor was a castle located in Stockholm, Sweden, on the site where Stockholm Palace is today.
It is believed to have been a citadel that Birger Jarl built into a royal castle in the middle of the 13th century. The name Tre Kronor is believed to have been given to the castle during the reign of King Magnus IV in the middle of the 14th century.
Most of Sweden's national library and royal archives were destroyed when the castle burned down in 1697, making the country's early history unusually difficult to document. When King Gustav Vasa broke Sweden free from the Kalmar Union and made Sweden independent again, Tre Kronor Castle became his most important royal seat.
Gustav Vasa expanded the castle's defensive measures, while his son John III of Sweden later rebuilt and improved the castle aesthetically, turning it into a renaissance style castle and adding a castle church. The keep may have existed previous to the 16th century, but in a much smaller form than on the pictures from the beginning and end of the 16th and 17th centuries.
The tower was then about half the height at the end of the 16th century. The castle consisted of two parts, the main castle and the walled in gardens surrounding it with the high tower in the middle. Gustavus Adolphus, also known in English as Gustav II Adolf or Gustav II Adolph was born in the castle. He was King of Sweden from 1611 to 1632. On 7