The monarchy of Sweden concerns the monarchical head of state of Sweden, which is a constitutional and hereditary monarchy with a parliamentary system. There have been kings in what now is the Kingdom of Sweden since time immemorial. Originally an elective monarchy, it became an hereditary monarchy in the 16th century during the reign of Gustav Vasa, though virtually all monarchs before that belonged to a limited and small number of families which are considered to be the royal dynasties of Sweden.
