Porvoo is the second oldest city in Finland. It has quite an interesting place in Finland’s history because it is one of only six medieval cities in the country. The city itself was first historically mentioned in documents dating back to the 14th century, and the city has an intriguing place in the heart of Finnish history, being the location where the Diet of Porvoo was signed in 189 – the pledge to establish the country’s government. Hiring a car in Porvoo means you can get more value out of your trip around the finest Finnish sights.