organ - choose a jigsaw puzzle to solve

In music , the organ (from Greek ὄργανον organon, "organ, instrument, tool ") is a keyboard instrument of one or more pipe divisions or other means for producing tones, each played with its own keyboard, played either with the hands on a keyboard or with the feet using pedals. The organ is a relatively old musical instrument , dating from the time of Ctesibius of Alexandria (285–222 BC), who invented the water organ. It was played throughout the Ancient Greek and Ancient Roman world , particularly during races and games . During the early medieval period it spread from the Byzantine Empire , where it continued to be used in secular (non-religious) and imperial court music , to Western Europe , where it gradually assumed a prominent place in the liturgy of the Catholic Church . Subsequently it re-emerged as a secular and recital instrument in the Classical music tradition .