
Olavinlinna (; ), also known as '''St. Olaf's Castle''', is a 15th-century three-tower castle located in Savonlinna, Finland. It is built on an island in the Kyrönsalmi strait that connects the lakes Haukivesi and Pihlajavesi. It is the northernmost medieval stone fortress still standing and also the best preserved of all the medieval castles in the Swedish realm. The castle forms a spectacular stage for the Savonlinna Opera Festival, which was held for the first time in the summer of 1912.
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Olavinlinna (; ), also known as '''St. Olaf's Castle', is a 15th-century three-tower castle located in Savonlinna, Finland. It is built on an island in the Kyrönsalmi strait that connects the lakes Haukivesi and Pihlajavesi. It is the northernmost medieval stone fortress still standing and also the best preserved of all the medieval castles in the Swedish realm. The castle forms a spectacular stage for the Savonlinna Opera Festival, which was held for the first time in the summer of 1912.
== History == thumbnail|The castle has three towers remaining|left thumb|Ground plan|left The fortress was founded by Erik Axelsson Tott in 1475 under the name Sankt Olofsborg'' in an effort to profit from the political turmoil following Ivan III's conquest of the Novgorod Republic. It was sited in Savonia so as to lay claim to the Russian side of the border established by the Treaty of Nöteborg.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).