He was converted to Christianity around 963; the first Christian King of Denmark. He reunited the Kingdom of Denmark. He was called "The Good". He acceded to the throne in 940, reigned for almost 50 years, and died fighting against his son, Sweyn Forkbeard. He had a large stone carved with runes in honor of his parents, still visible at Jelling. His palace was at Roskilde, in Sjaelland, where he also had a church built.