Spent the day in Tønsberg, the oldest city in Scandanavia. I came to do a one-day high school teacher math workshop, which was very fun. Afterwards, my host took me around to see the downtown and the fortress. He gave me a photobook of Tønsberg, and we stood on the fortress grounds high above the city and flipped through the book as he pointed out locations depicted by the pictures in the book. It was a fine way to experience the town in a short time.
Tønsberg was founded in 871, making it 126 years older than Trondheim. Tønsberg is located in southern Norway, about 100 km south of Oslo on the western side of Oslofjord.