Prince Gustav of Vasa, Count of Itterburg, born Crown Prince of Sweden, was the son of King Gustav IV Adolf of Sweden and Queen Frederica. His Austrian princely title was actually spelled Wasa.
Gustav, Prince of Vasa
Gustav IV Adolf or Gustav IV Adolph was King of Sweden from 1792 until he was deposed in a coup in 1809. He was also the last Swedish monarch to be the ruler of Finland.
Portrait by Per Krafft the Younger, 1809
Gustav Adolf at the age of seven
Gustav IV Adolf's arrest
Walking with his wife Queen Frederica