| Finnish: Ullanlinna | |
| Other Name: | Swedish: Ulrikasborg |
| Settlement Type: | Helsinki Subdivision |
| Subdivision Type: | Country |
| Subdivision Name: |  Finland |
| Subdivision Type1: | Region |
| Subdivision Name1: | Uusimaa |
| Subdivision Type2: | Sub-region |
| Subdivision Name2: | Greater Helsinki |
| Subdivision Type3: | Municipality |
| Subdivision Name3: | Helsinki |
| Subdivision Type4: | District |
| Subdivision Name4: | Southern |
| Parts Type: | Subdivision regions |
| Parts Style: | para |
| P1: | none |
| Total Type: | |
| Area Total Km2: | 0.75 |
| Population Total: | 10,040 |
| Population As Of: | 2005 |
| Population Density Km2: | 13,387 |
| Postal Code Type: | Postal codes |
| Postal Code: | 00140, 00150 |
| Blank Name Sec1: | Subdivision number |
| Blank Info Sec1: | 07 |
| Blank1 Name Sec1: | Neighbouring subdivisions |
| Blank1 Info Sec1: | Eira Punavuori Kaivopuisto |
Finnish: Ullanlinna (in Finnish ˈulːɑŋˌlinːɑ/; 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 Finnish: [[Suomenlinna]]. The name Finnish: Ulla refers to the Swedish Queen Ulrika Eleonora (1688–1741).[1] 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 Finnish: [[Jugendstil]] architectural style synonymous with National Romanticism.[2]
The central part of Ullanlinna is marked by the Finnish: [[Tähtitorninpuisto]] park (English: Observatory Park),[1] 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.