Kärnan, Medieval fortified tower in Helsingborg, Sweden
Kärnan is a medieval tower of dark red-brown brick in Helsingborg, the surviving core of a larger Danish fortress. A broad rectangular block carries a narrower cylindrical stair turret on its left side; both are crenellated, and the turret rises slightly higher. Narrow arrow slits and two small arched windows pierce the facade, a band of lighter stone crosses the lower section, and a wooden staircase leads to an arched opening.
Dendrochronological dating places the brick core in the 1310s, under King Eric VI of Denmark; Danish legend instead traces the fortress to the legendary King Fróði. It was Denmark's most important stronghold guarding the strait between Scania and Zealand. Surrendered to Sweden by the Treaty of Roskilde in 1658, retaken by Danish forces in 1676, it returned to Sweden by the Treaty of Lund in 1679, after which Charles XI had most of it demolished.
The name Kärnan means "The Core", from its role as the surviving heart of the Danish fortress. The tower was donated to the city of Helsingborg by the government in 1741. On 2 June 2022 the Helsingborg band The Sounds played a concert on the roof during the H22 City Expo, broadcast live and seen by about 8,000 people in Slottshagen park.
The internal staircase is steep and demands effort, so comfortable shoes are a good idea. The view from the top rewards the climb, especially on clear days when you can see far across the surrounding landscape.
The tower's crenellations are not medieval: they date from the 1893–94 restoration led by engineer Oscar Ferdinand Trapp, with architect Josef Alfred Hellerström, who worked from the oldest known medieval illustration of the structure. The tower was donated to the city of Helsingborg by the government in 1741.
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