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Kulosaari (Swedish: Brändö) is an island and an East Helsinki suburb in Helsinki, Finland. It is also the 42nd neighbourhood of the city. Construction of villas on the island started in the beginning of the 20th century, and a bridge from Sörnäinen was opened in 1919. Kulosaari was an independent municipality since 1922 until 1946, when it was merged to Helsinki. Kulosaari is home to 3,700 people (2003), and has a size of 1.81 square kilometres (0.70 sq mi). The island is host to both Swedish-speaking and Finnish-speaking primary schools and the Kulosaari Secondary School (Kulosaaren Yhteiskoulu, or KSYK) international secondary school, as well as Brändö Gymnasium, a gymnasium for Swedish-speaking Finns. Trams served the island from 1910 to 1951 – before the first bridge was completed, ferries were used to transport the trams. In 1982 Kulosaari got its own subway station, an original station of the Helsinki Metro. An important highway called Itäväylä, serving Helsinki's eastern suburbs, goes through the island, cutting it in two halves. Kulosaari is connected via a short bridge to the adjacent island of Mustikkamaa, which is used for various recreational purposes.

Embassy of Iraq in Helsinki is located in the district of Kulosaari and sticks out due to its Middle-Eastern architecture. At first this was met with scepticism and resentment from the locals since the building was so different from the rest of the building in Kulosaari. However, due to the diplomatic immunity, the state of Iraq was free to design its own embassy however it wanted.The property has 2,800 m2 of space. It was the first embassy building built by the Saddam Hussein regime in Western Europe starting the construction work in 1979 and finishing next year. The first ambassador was general Salih Mahdi Ammash who was known locally as the "Caliph of Kulosaari" due to his boisterous behaviour.The Embassy was designed by DLA (Dinkha Latchin Associates), founded by Dinkha Latchin, an Iraqi born British architect. The design was pushed to reflect traditional Iraqi art and architecture. During the Gulf War the embassy was emptied and it wasn't in use for years falling into disrepair. In 2007 Iraq decided to repair the building entirely.

Tullisaari (Finnish), Turholm (Swedish) is a southeastern neighborhood of Helsinki, Finland.

Kulosaari Church (Finnish: Kulosaaren kirkko, Swedish: Brändö kyrka) is a Lutheran church located in the Kulosaari suburb of Helsinki, Finland.

Kulosaari metro station (Finnish: Kulosaaren metroasema, Swedish: Brändö metrostation) is a ground-level station on the Helsinki Metro. It serves the island district of Kulosaari in East Helsinki. There are 50 bicycle and 36 car parking spaces at the station. Both lines M1 and M2 serve Kulosaari. The station was opened on 1 June 1982, and is therefore one of the original stations on the system. Kulosaari underwent a facelift in 2011. The station was originally designed by Jaakko Ylinen and Jarmo Maunula. It is located 1.8 kilometres from Kalasatama metro station and 1.4 kilometres from Herttoniemi metro station.

Herttoniemenranta (Finnish), Hertonäs strand (Swedish) is a southeastern neighborhood of Helsinki, Finland. Herttoniemenranta is part of Herttoniemi and it was built in the late 1990s and early 2000s.

Kruunuvuorenselkä (Swedish: Kronobergsfjärden) is a body of water in Helsinki, Finland, located between the city centre and the eastern suburbs. It is approximately 5 kilometres (3.1 mi) long (north-south) and 2–3 kilometres (1.2–1.9 mi) wide (east-west), and bounded by the islands of Suomenlinna and Vallisaari to the south; the districts of Santahamina and Laajasalo to the east; the island of Kulosaari to the north; and the city centre area of Helsinki to the west. Kruunuvuorenselkä carries much of the waterborne traffic into and out of Helsinki's South, Hanasaari and Sörnäinen Harbours, shuttle ferry and sightseeing traffic between the city centre and nearby islands, as well as extensive leisure boating based at marinas in Pohjoisranta, Herttoniemenranta, and elsewhere. The fairways leading to each of the main harbours around Kruunuvuorenselkä are a minimum of 9.3 metres (31 ft) deep. Access from Kruunuvuorenselkä to the wider Gulf of Finland is mostly through the narrow Kustaanmiekka strait between Suomenlinna and Vallisaari.A bridge, Kruunuvuorensilta, is being built across Kruunuvuorenselkä as part of the Crown Bridges initiatives, connecting central Helsinki with the eastern suburbs at Laajasalo and beyond. The bridge will carry pedestrian and bicycle traffic and a tram route, but no car traffic. Construction began in late 2021, and the bridge is expected to open to traffic by 2027.

Kulosaari Secondary School (Kulosaaren Yhteiskoulu, abbr. KSYK) is a private secondary school located in Kulosaari, Helsinki, founded in 1940. It is an international school, teaching in both Finnish and English. The school comprises both lower secondary (yläaste) (grades 7–9) and upper secondary or gymnasium (lukio) stages, with approximately 900 pupils in total. Kulosaari is one of the leading gymnasia in the country by exam results.

Hevossalmi (Finnish), Hästnässund (Swedish) is a southeastern neighborhood of Helsinki, Finland.

Herttoniemi metro station (Finnish: Herttoniemen metroasema, Swedish: Hertonäs metrostation) is a ground-level station on the Helsinki Metro. It serves the district of Herttoniemi in East Helsinki. There are 193 bicycle and 148 car parking spaces at the station. Both lines M1 and M2 serve Herttoniemi. As the station was opened on 1 June 1982, Herttoniemi is one of the system's original stations. It was designed by Jaakko Ylinen and Jarmo Maunula. It is located 1.4 kilometres from Kulosaari metro station and 1.4 kilometres from Siilitie metro station.

Hertsi is a shopping center located in Herttoniemi, Helsinki, Finland, the construction of which was completed in the spring of 2020. It is located along Itäväylä, quite close to Herttoniemi metro station. In addition to grocery stores and restaurants, the shopping center includes a library, youth facilities and a kindergarten to be opened later. The previously built shopping center Megahertsi is part of the center. In 2021, three apartment buildings with a total of 250 apartments will be completed on the shopping center site.The lowest store floor in the shopping center is the street level, whose largest store is Tokmanni. On the first floor, on the Prisma level, are located, among other things, Prisma, Kotipizza, Fafa's, Arnolds, the pet store Musti ja Mirri, Silmäasema and Veikkaus Pelaamo. The tenants on the second floor include Elixia, Fitness24Seven, Herttoniemi Library and the City of Helsinki's youth services.The mall opened on March 19, 2020. The opening ceremony was controversial event, because was held in the midst of a coronavirus epidemic despite recommendations to avoid major events.

The Kulosaari cemetery (Finnish: Kulosaaren hautausmaa, Finnish: Leposaaren hautausmaa, Swedish: Brändö begravningsplats) is the smallest cemetery in Helsinki parish union. It is situated on Iso-pässi island (later Leposaari island) in Kulosaari district of Helsinki. It was inaugurated in 1925. The cemetery chapel was designed by architect Armas Lindgren and added in 1927. There is also an area for war heroes' graves.