The Uspenski cathedral: where are in Finland or Russia?

 Earthhhhhhh! The captain’s announcement wakes up: “Dear passengers, I’m glad to inform you that we have arrived to Helsinki, Welcome to Finland! ”, in a series of incomprehensible guttural sounds. I must confess that the Finnish language is “unusual”. I go to take a quick shower, however Fredrick informs me that there is no rush…