The history of Savonlinna is inextricably linked to the majestic Olavinlinna Castle. The actual beginning of the city's chronicles is considered to be 1475, when the Regent Erik Axelsson Tott founded the Castle of St. Olaf on a rocky island in the Kyrönsalmi Strait. A settlement quickly formed around the rising stronghold, growing and developing under its protection. Savonlinna received official city status in 1639 by the decree of Governor-General Per Brahe, becoming one of the oldest cities in inland Finland.
The transformation of a small settlement into an important urban centre was largely due to its unique geography. The city is located in the heart of the Saimaa lake system, where islands and straits made this place ideal for controlling waterways, which served as the main transport arteries at that time. The presence of a major castle turned Savonlinna into the administrative capital of the Savo region, attracting officials, nobility, and craftsmen, while its convenient location at the crossroads of routes promoted the development of fairs and constant trade.
In the first centuries of its existence, the city's economy was closely intertwined with the needs of the fortress. Local residents engaged in crafts necessary for servicing the garrison, as well as fishing and boat building. Trade in the region's natural resources—furs, tar, and timber—played an important role. Thanks to the castle, European cultural trends and architectural traditions penetrated Savonlinna, distinguishing the city favourably from the surrounding rural settlements.