Porvoo Museum is both a historical museum and an art museum. The two buildings in which it is housed date from the 1760s and stand on the edge of the square beside the Old Town Hall in the heart of the oldest part of Porvoo. http://www.discoveringfinland.com/destination/porvoo-museum/

The church was originally made of wood. The first stone walls were built between 1410 and 1420 and in about 1450 the church was expanded four meters towards east and six meters towards south. http://www.discoveringfinland.com/destination/porvoo-cathedral/