"Here, in an ordinary train station in Wuppertal, Germany, the group Árstíðir began singing the Icelandic hymn “Heyr himna smiður”. The hymn — the oldest known Scandinavian hymn — dates back to the early 13th century when the Icelandic chieftain Kolbeinn Tumason is purported to have written these familiar words on his deathbed. Then, more than seven centuries later, the composer Þorkell Sigurbjörnsson put them to music." On Being Blog
