The Academy of Sciences edifice was built after World War II, between 1951 and 1961, collecting the necessary financing from the newly established kolkhozes in Latvia and - as further expenses increased, collecting the finances as 'voluntary donations' deducted from the salaries of the Latvian rural population.
The building is decorated with several hammers and sickles as well as Latvian folk ornaments and motifs. The spire originally was decorated with a wreath and a five pointed star, which was removed after Latvia regained independence in 1991. Being 108 metres tall, it was the first skyscraper in the republic and was the tallest building until the construction of the Swedbank Headquarters in Latvia.
The building, designed by Osvalds Tīlmanis, Vaidelotis Apsītis, and Kārlis Plūksne, is a cousin to similar Stalin-era skyscrapers, which were representative of what became known as Stalinist architecture (sometimes referred to as Socialist Classicism). The architecture of the skyscraper resembles many others built in the Soviet Union at the time, most notably the main building of Moscow State University. Local nicknames for this building include Stalin's birthday cake and the Kremlin.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.