Nonnebakken

Nonnebakken is an archaeological site located on a hill in Odense, Denmark, notable for its Viking ring castle constructed between 980 and 1000 CE during the reign of Sweyn Forkbeard. This defensive structure was strategically positioned to control the Odense River. The site also housed a Benedictine nunnery until the end of the 12th century when the nuns relocated. The remains of the circular castle, with its significant earthwork ramparts, were heavily damaged in the late 19th century due to modern construction. However, 20th-century archaeological excavations uncovered the castle's original dimensions and features, affirming its historical significance. In 2023, Nonnebakken, along with other Viking ring castles in Denmark, was inscribed on the UNESCO World Heritage List for its architectural uniqueness and historical significance.