🇩🇰 Denmark · Hillfort
Trelleborg Viking Ringfort (Slagelse)
Viking Age (c.980–1000 CE, Harald Bluetooth) · Danish Viking Age
Archetypal Viking ring fortress west of Slagelse on Zealand, 136.5 m diameter circular earthwork with four cardinal gates, internal quadrants with 16 longhouses and outer bailey, built c.980 under…