As we understand, the lyre was associated with God Apollo worship. It is the musical instrument that all citizens in ancient Greece learned, and not just the professional musicians, whose instrument was the kithara (guitar). Therefore, the lyre is an instrument that introduces the young people of that era, in musical education, as well as in the study of mathematics and even planetary systems. The number of the strings, according to the sources, of the Ancient Greek lyre, varies depending on the period we are studying. We have information for three, five, seven strings or more, but the most prevalent for many centuries is the seven-stringed ancient Greek lyre. On the representations we see upon vases we find, mainly, wooden pecheis(arms), but there are also some references in musical texts of that time about horn pecheis(arms), instead of wooden.