The Old Riksdag
The precursor to the modern Riksdag was the Riksdag of the Estates or StÄndsriksdagen. Of ancient origin in the Viking Things, the meeting of the Swedish nobility at Arboga, in 1435 is considered as the first Riksdag. This informal representation was formalized in 1527 by King Gustav I of Sweden to include representatives of all the Four Estates, which historically reflected the lines of division in Swedish society: Nobility, Clergy, Burgesses and Peasants. Under the Instrument of Government of 1809 the Riksdag shared the powers of Government with the King.
Read more about this topic: History Of The Riksdag