The Helsinki Synagogue (Finnish: Helsingin synagoga; Swedish: Helsingfors synagoga) is an Orthodox Jewish synagogue, located at Malminkatu Street 26, in the Kamppi district of Helsinki, Finland.^[1]

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Helsinki Synagoga
Finnish: Helsingin synagoga Swedish: Helsingfors synagoga
Synagogue dome in 2006
Religion
Affiliation	Orthodox Judaism
Rite	Nusach Ashkenaz
Ecclesiastical or organizational status	Synagogue
Status	Active
Location
Location	Malminkatu Street 26, Kamppi, Helsinki
Country	Finland
Location of the synagogue in Finland
Geographic coordinates	60°10′03″N 24°55′42″E
Architecture
Architect(s)	Jac. Ahrenberg
Type	Synagogue architecture
Style	Byzantine Revival Art Nouveau
Date established	c. 1900 (as a congregation)
Completed	1906
Specifications
Capacity	600 worshippers
Dome(s)	One
Materials	Brick

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The rectangular synagogue building, designed in the Byzantine Revival and Art Nouveau styles^[2] by the Viipuri-born architect, Jac. Ahrenberg, was completed in August 1906 and serves the 1,200-strong Jewish community.^[3] The synagogue dome is a distinctive landmark on the Helsinki skyline, and was renovated and enlarged in 1926, when a library was added. A Jewish community center, located adjacent to the synagogue, including an aged care facility, an auditorium, meeting rooms, and a mikveh, was completed in 1967.^[4][5]

As one of the most northern in the world, the congregation follows the halachic hour, especially during Finnish summers where it doesn't get dark, even at night. Under rabbinic Jewish law, an hour is calculated by taking the total time of daylight of a particular day, from sunrise until sunset, and dividing it into twelve equal parts. The halachic hour varies by the season and sometimes by the day.^[1] As a result, shabbat services are conducted during daylight.

• Helsinki synagogue, 1908
• Helsinki synagogue, 2020
• Helsinki synagogue, 2020

• History of the Jews in Finland