In 2007 a Dutch tourist been murdered in the middle of the day in the middle of the city by a person who stubbed him to death.
The murderer been prosecuted and sentenced to prison for 11.5 years. After 50% reduction in sentenced he will probably served half of the time.
That is what life worth of in Finland, 5 years about.
Think about it.
Even though Porvoo seems to be a great place for bikers, parents with small childen are well advised to leave their baby carriage at home. The streets are not only made of cobblestone but quite steep as well(especially if you want to go up to the church), which makes it quite exhausting to push the carriage. In any case: Wear comfortable shoes and leave the fancy ones at home!
In the summer, there are lots of tourists in Porvoo, for such a small place in can be very crowded especially during the weekend.