Until its dissolution in 1866 the highest authority in Sweden next to the King was the Riksdag of the Estates or Ståndsriksdagen. It was a Diet made up of the Four Estates, which historically were the lines of division in Swedish society. The Estates when convening in the Diet were also be called Riksens ständer.
Historically the four estates in the Swedish society were:
The only corporation out of the four estates that exists today is the Swedish nobility or Riddarhuset, which legally still has a quasi-official role as the representation of the nobility.
The modern Centre Party which grew out of the Swedish Farmers movement, sitting in the Parliament still today, could be construed as a modern representation with a traditional bond to the Estate of the Peasants.