He was known as Karl Sverkersson during his reign and is the first historically known king of Sweden with the name Karl.
After the fall of Magnus, Charles received general recognition in Sweden as king. It was also during his reign that the Archbishop of Uppsala was established.
In the spring of 1167, King Charles was killed on Visingsö (in lake Vättern) by underlings of Knut Eriksson, head of the rival Eric dynasty, who so overtook the throne. Charles was buried in Alvastra monastery.
Starting from Charles' death, his kinsmen (probably his half-brothers) Burislev and Kol together opposed Canute's kingship and were rival kings, recognized in some Gothenlander parts of Sweden; but last of them was killed in 1173, after which Canute's government got recognized overall.
Their sole historically attested child was Sverker Karlsson, a young boy when Charles died, and who later became the chosen king Sverker II of Sweden (1195-1208/10) after the death of Charles' rival king Canute I.