Following the Finnish War in 1809, Sweden ceded its eastmost provinces to the Russian Empire. Comprising much of present-day Finland, these became a Grand Duchy under the Emperor, but the political institutions were kept practically intact. The Finnish estates assembled in 1809 at Porvoo to confirm the change in their allegiance. This Diet of Finland followed the forms of the Swedish Riksdag, being the legislative body of the new autonomous region. However, during the reigns of Alexander I and Nicholas I it was not assembled and no new legislation was enacted. The diet was next assembled by tsar Alexander II in 1863, due to the need to modernize the laws. After this the Diet met regularly until 1905, when it passed an act forming a new unicameral parliament. That assembly has been Finland's legislative body since then. The Finnish House of Nobility (; ) carries on the tradition of the Estate of Nobility, but no new families have been ennobled since 1906.