context: The city of Savonlinna originated from the settlement born on the West Bank of Kyrönsalmi next to the Olavinlinna castle 1475. The Savonlinna ore (Nyslotts malm), which was located next to Olavinlinna, was raised into a city by the initiative of Peter Brahe. Malon, Savonlinna, was home to artisans working in the fortress and other people who could not live in the castle.
question: When was Savonlinna Founded?
answers.text: 1475