The aim of this thesis is to study Viking Eggeling?s artwork Diagonal Symphony together with Eggeling?s own art theoretical writings. This method of reading Eggeling?s art theoretical writings with the aim to try and create a deeper understanding of his art and especially Diagonal Symphony is a new approach in Eggeling?s art historical discourse. The thesis starts with a description of how the field of art history has understood Eggeling and his art primarily through art historical research aimed at Hans Richter.