Suomenlinna Church

https://www.suomenlinna.fi/en/visitor/sights/suomenlinna-church/

<p>Plastered grey, the Suomenlinna church is one of the oldest shrines in Helsinki. It greets those arriving from the sea by transmitting the H code with its Gustavian style tower, to indicate Helsinki. The onion domed church, originally built as an orthodox garrison church, was converted into a Lutheran church in the 1920s when the country had become independent. A lighthouse serving ship and air traffic still operates in the church tower.</p>