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Helsinki Subdivision
Position of Ullanlinna within Helsinki
Position of Ullanlinna within Helsinki
Country  Finland
Region Uusimaa
Sub-region Greater Helsinki
Municipality Helsinki
Subdivision number 07
District Southern
Subdivision regions none
Area 0.75 km2 (0.29 sq mi)
Population (2005) 10,040
 • Density 13,387/km2 (34,670/sq mi)
Postal codes 00140, 00150
Neighbouring subdivisions Eira

Ullanlinna (Swedish: Ulrikasborg) is a city district of Helsinki, in Finland. The name Ullanlinna (English: Ulla's castle) refers to the fortification line that was built at the southern edge of the area during the 18th century (no longer visible), as part of the town fortifications, which also included the fortress of Suomenlinna. The name Ulla refers to the Swedish Queen Ulrika Eleonora (1688–1741). During the 19th century the area was dominated by summer pavilions owned by the wealthy Helsinki middle-classes. The appearance of the area changed gradually at the end of the 19th century as the wooden houses were replaced with much higher stone buildings, designed in the prevailing Jugendstil architectural style synonymous with National Romanticism.

The central part of Ullanlinna is marked by the Tähtitorninpuisto park (English: Observatory Park), at the centre of which is the former observatory, designed by Carl Ludvig Engel in 1825 in the Neoclassical style of architecture. Other notable buildings in the district are the Design Museum and the Museum of Finnish Architecture.


Coordinates: 60°09′30″N 024°56′50″E / 60.15833°N 24.94722°E / 60.15833; 24.94722