A pipe organ crafted some 1,000 years ago for Bethlehem’s Church of the Nativity made music once more, as the instrument was unveiled at Jerusalem’s Terra Sancta Museum. It was hailed as the “oldest organ in Christendom.” It was rediscovered in 1906 during construction work.

https://www.timesofisrael.com/oldest-organ-in-christendom-makes-music-in-jerusalem-after-centuries-of-silence/