The Castle of the Warmian Cathedral Chapter in Ols

The Castle of the Warmian Cathedral Chapter in Olsztyn is a 14th-century Gothic stronghold and the city’s most iconic landmark. Quick Profile The Copernicus Connection: The castle’s most famous resident was Nicolaus Copernicus, who lived here between 1516 and 1521. He managed the region’s administration and organized the defense against the Teutonic Knights. Scientific Legacy: It houses the world’s only surviving astronomical instrument made by Copernicus: a sun-tracking table painted directly onto the cloister wall. Architecture: A classic "Brick Gothic" fortress featuring a massive 40-meter watchtower, impressive ribbed vaults, and a courtyard housing ancient Prussian stone idols. Today: It serves as the Museum of Warmia and Mazury, showcasing regional history, art, and the life of its most famous astronomer.