Porvoo is a city and a municipality situated on the southern coast of Finland approximately 50 kilometres (30 mi) east of Helsinki. Porvoo is one of the six medieval towns in Finland, first mentioned as a city in texts from 14th century. Porvoo was given city rights around 1380, even though according to some sources the city was founded in 1346. The old city of Porvoo was formally disestablished and the new city of Porvoo founded in 1997 when the city of Porvoo and the Rural municipality of Porvoo were consolidated.
When Sweden lost the city of Vyborg to Russia in 1721, the episcopal seat was moved to Porvoo. At this time, Porvoo was the second largest city in Finland. After the conquest of Finland by Russian armies in 1808 Sweden had to cede Finland to Russia in 1809 (the Treaty of Fredrikshamn). The Diet of Porvoo in 1809 was a landmark in the History of Finland. The Tsar Alexander I confirmed the new Finnish constitution (which was essentially the Swedish constitution from 1772), and made Finland an autonomous Grand Duchy.
The town is famed for its “Old Town”, a dense medieval street pattern with predominantly wooden houses. The Old Town came close to being demolished in the 19th century by a new urban plan for the city. The plan was cancelled due to a popular resistance headed by Count Louis Sparre. The central point of the old town is the medieval, stone and brick Porvoo Cathedral which gave its name to the Porvoo Communion – an inter-church agreement between a number of Anglican and Lutheran denominations. The cathedral was damaged by fire on 29 May 2006: the roof was totally destroyed but the interior is largely intact. A drunken youth had played with fire at the church, unaware of recent tarwork and nearby tarcontainers, accidentally causing a large fire. He was later sentenced to a short prison term and restitutions of 4.3 million Euro. The red-coloured wooden storage buildings on the riverside are a proposed UNESCO world heritage site. By the early 19th century authorities already understood the value of the old town. With the need for growth, a plan was envisioned for a ‘new town’ built adjacent to the old town, following a grid plan but with houses also built of wood.
By the end of the 20th century there was pressure to develop the essentially untouched western side of the river. There was concern that growth would necessitate the construction of a second bridge across the river into the town, thus putting further strain on the wooden town. An architectural competition was held in 1990, the winning entry of which proposed building the second bridge. Plans for the western side of the river have progressed under the direction of architect Tuomas Siitonen, and both a vehicle bridge and a pedestrian bridge have been built. The design for new housing is based on a typology derived from the old storehouses on the opposite side of the river. Yet another new development entails the construction of a large business park called King’s Gat. Porvoo railway station does not have regular train service, but special excursion trains from Kerava (either with steam locomotives or former VR diesel railcars from the 1950s) operate on summer weekends.