The Porvoo City Tourist Office provides free brochures of Porvoo. The brochures include all sorts of useful information for tourists, like: places to visit, accomodation, restaurants and a map. The brochure is available in various languages.
If the Tourist Office is closed you will get the brochure at the outside of the entrance. The Tourist Office is located at Rihkamakatu 4, right in the heart of the city centre.
Clothing/Shoes/Weather Gear: It is good that you wear the reasonable shoes. As you can see from the pic, the streets of old town are cobblestones and the best way to explore the old town is to walk.