Old town wooden houses in Porvoo, Southern Finland. Porvoo is one of the six medieval towns in Finland, first mentioned as a city in texts from 14th century. 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. Thanks to him we can enjoy the beauty the city offers.