Matthias Heinrich Elias Eddelien (22 January 1802 in Greifswald – 24 December 1852 in Stuer) was a Danish history painter of German origin.Eddelien arrived in Copenhagen as a young man and attended the Royal Danish Academy of Fine Arts from 1821 studying under Christoffer Wilhelm Eckersberg. In 1837, he was awarded the Academy's large gold medal. From 1839 to 1843, he travelled to Italy and Germany to widen his studies. He painted portraits, altarpieces and decorative works, including the Pompeian Apartment in Christian VIII's Palace at Amalienborg Palace. His principal work is the decoration of Christian IV's Chapel in Roskilde Cathedral but this led to the laming of his right arm. He died when receiving spa treatment at Stuer.