section_heading: Ime Austrija
paragraph_text: However, Friedrich Heer, one the most important Austrian historians in the 20th century, stated in his book Der Kampf um die österreichische Identität (The Struggle Over Austrian Identity), that the Germanic form Ostarrîchi was not a translation of the Latin word, but both resulted from a much older term originating in the Celtic languages of ancient Austria: More than 2,500 years ago, the major part of the actual country was called Norig by the Celtic population (Hallstatt culture); No- or Nor- meant "east" or "eastern",[citation needed] whereas -rig is related to the modern German Reich; meaning "realm". Accordingly, Norig would essentially mean Ostarrîchi and Österreich, thus Austria. The Celtic name was eventually Latinised to Noricum after the Romans conquered the area that encloses most of modern day Austria, in approximately 15 BC. Noricum later became a Roman province in the mid 1st century AD.[8]