4. One of the main issues considered by Celtic Studies is the meaning of the term “Celtic” itself. From a scientific point of view, the word “Celtic” is primarily a linguistic term, and it refers to a group of Indoeuropean languages which developped in the European Continent some 5,000 years ago. Science does not consider, up to now, that the term “Celtic” has something to do with a distinctive culture, a particular ethnic group, a religion or a kind of music.