Duke John Albert of Sweden was a member of the Swedish royal family, born on January 21, 1589. He was the son of Duke Charles of Södermanland and Catherine of Sweden. John Albert held the title of Duke of Finland and was known for his involvement in the political affairs of the time, particularly during the reign of his cousin, King Gustavus Adolphus. He was also a prominent figure in the House of Vasa, which ruled Sweden during the 16th and 17th centuries. Duke John Albert's life was marked by his efforts to strengthen the influence of the Swedish monarchy and his contributions to the cultural landscape of the era. He passed away on March 12, 1618.