On June 09, 2022, King Carl Gustaf and Queen Silvia of Sweden visited Aland on the occasion of the island celebrating the 100th anniversary of its autonomy. The King and Queen were welcomed in Mariehamn by Finnish President Sauli Niinistö and Mrs Jenni Haukio. Then they visited Bomarsund Fortress, which was the site of a battle in 1854 that led to Åland's demilitarization. Afterwards, they visited Castel of Kastelholm.