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A John Cage organ piece currently being performed in a German church is scheduled to last how many DAYS?

233,000
days
A performance of John Cage's Organ²/ASLSP began in Halberstadt in 2001 and is scheduled to end in 2640 — 639 years, with chord changes so rare each one draws a crowd.SOURCEJohn Cage Organ Foundation, Halberstadt
Scale check: 233,000 is roughly Wembley, full, plus a bit.
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