This year marks King Carl Gustaf's 50 years as Sweden's head of state. The King ascended the throne on September 15, 1973. As part of the celebration of the King's 50th anniversary on the throne, King Carl Gustaf and Queen Silvia are visiting Sweden's 21 counties in 2023. On June 4, the King and Queen visited Gothenburg, the capital of the Vastra Gotaland county. Gothenburg was founded 400 years ago.