 The "Saxo Grammaticus" and other early sources associate the name Roskilde (meaning "Ro's spring") with the legendary King Roar who possibly lived there in the 6th century.According to Adam of Bremen and the "Saxo Grammaticus", Roskilde was founded in the 980s by Harald Bluetooth.On high ground above the harbour, he built a wooden church consecrated to the Holy Trinity as well as a royal residence nearby.