Since 1907 the Parliament of Finland was convened in House of the Estates and Finnish House of Nobility. Both buildings became however too small for the 200 members of the independent Finland Parliament. In 1923 a competition was held to choose a site for a new Parliament House. Arkadianmäki, a hill beside what is now Mannerheimintie, was chosen as the best site.
The architectural competition which was held in 1924 was won by the firm of Borg–Sirén–Åberg. Johan Sigfrid Sirén was given the task of designing Parliament House. The building was constructed 1926–1931 and was officially inaugurated on March 7, 1931. Ever since then, and especially during the Winter War and Continuation War, it has been the scene of many key moments in the nation's political life.
Sirén designed Parliament House in an architectural style combining Neoclassicism with early twentieth century modernism. The exterior is red granite and the façade is lined by fourteen columns with Corinthian capitals. The building has five floors, each of which is unique. The floors are connected by a white marble staircase and famous paternoster lifts. Most important for visitors are the main lobby, the stately Session Hall and the large Hall of State.
Guided tours are arranged in Parliament house. Tuesdays and Fridays you can watch the Parliament in session from the public balcony.
Reference: Wikipedia
Bomarsund fortress and garrison was built in 1832-1854 by Russian Empire to defence Åland Islands against enemies. British and French fleet attacked against it during the Crimean War in 1854. After a week of fighting the British stormed the remaining fort. Anglo-French forces destroyed it totally after battle. In the Treaty of Paris 1856, the entire Åland Islands were demilitarized, which is a status that has been preserved until this day.
Nowadays there are some ruins left and fortress area is open for visitors.