Riksdag Riksdag of the Estates, by tradition thought to have first assembled in Arboga in 1435, and in 1866 following reforms of the 1809 Instrument of Government that body was transformed into a bicameral legislature with an upper chamber () and a lower chamber (). The most recent general election was held on 9 September 2018. The Swedish word "riksdag", in definite form "riksdagen", is a general term for "parliament" or "assembly", but it is typically only used for Sweden's legislature and certain related institutions. In addition to Sweden's parliament, it is also used for the Parliament of Finland and the
Riksdag Estonian Riigikogu, as well as the historical German "Reichstag" and the Danish "Rigsdagen". In Swedish use, "riksdagen" is usually uncapitalized. "Riksdag" derives from the genitive of "rike", referring to royal power, and "dag", meaning diet or conference; the German word "Reichstag" and the Danish "Rigsdag" are cognate. The "Oxford English Dictionary" traces English use of the term "Riksdag" in reference to the Swedish assembly back to 1855. The roots of the modern Riksdag can be found in a 1435 meeting of the Swedish nobility in the city of Arboga. This informal organization was modified in 1527 by the first modern