"To my eyes and ears the organ will ever be the King of Instruments." - Wolfgang Amadeus Mozart The Organ is one of the oldest musical instruments in Western musical tradition: the earliest known organ, the Hydraulis, was invented around 3 B.C. in ancient Greece. The Organ was introduced into Europe in the 8th century A.D., and by the 14th century had developed into what we would recognize today as the Pipe Organ. The classical organ repertoire covers music from the 1400s through today - nearly from the beginning of written western music.