The Holy Trinity Church is a Finnish Orthodox Church located in the Kruununhaka district of Helsinki, on the corner of Unioninkatu and Rauhankatu. The church was built in the neo-classical style in 1826 under the direction of the architect Carl Ludvig Engel, and was dedicated and opened in the following year. The Holy Trinity services the city's orthodox community with Divine Liturgy held in both Church Slavic and Finnish.
Source: WikipediaRead more on Wikipedia