The organ, something else that was introduced in the second millenium and is now taken to be "traditional" by the West?

Is the Organ Really a Sacred Instrument? by Joseph P. Swain
Pianos and guitars are comparatively cheap, and money is tight. Those of us who believe the organ is a sacred instrument have to take the question – “is the organ really a sacred instrument?” – and make it real, a spiritual matter for our pastors and parish councils.