St. Hallvard's Cathedral, Medieval cathedral ruins in Old Town, Norway
St. Hallvard's Cathedral is a medieval ruin in the heart of Oslo, set within Ruinparken near Bispegata street. The remaining stone walls and foundations trace the outline of a large church that once stood as the main religious building for the region.
The cathedral was founded around 1070 and served as the bishop's seat for eastern Norway for centuries. It was abandoned in 1655, ending its long role as the main church institution in the region.
St. Hallvard gave his name to this cathedral after being killed near Oslo in the 11th century, and he became the patron saint of the city. His image, holding a millstone, the instrument of his death, still appears on the coat of arms of Oslo today.
The ruins sit in Ruinparken, close to Bispegata in Oslo's old bishop's quarter, and are easy to reach on foot. Visiting in spring or summer gives the best light for seeing the stone structures and the other remains in the park.
Several medieval Norwegian kings were buried at this site, among them Sigurd the Crusader and Magnus the Blind. Their graves now lie beneath the ground of the park, invisible but directly underfoot as visitors walk among the ruins.
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