Porvoo Cathedral

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60°23′50″N 25°39′27″E / 60.39722°N 25.65750°E / 60.39722; 25.65750

Porvoo Cathedral (Finnish: Porvoon tuomiokirkko; Swedish: Borgå domkyrka) is a cathedral of the Evangelical Lutheran Church of Finland in Porvoo, Finland. It was built in the 15th century, although the oldest parts date from the 13th century.^[1] It is the seat of the Diocese of Borgå, Finland's Swedish-speaking diocese (Borgå is the Swedish language form of Porvoo). The cathedral is also used for services by the Porvoo Finnish-speaking parish, which is administratively part of the Diocese of Helsinki. The church first became a cathedral in 1723, when the diocese of Viipuri (Viborg) (now the Diocese of Tampere) moved to Porvoo, after Vyborg was ceded to Russia in the Treaty of Nystad.