HALBERSTADT, Germany (AFP) - A new chord was scheduled to sound in the world's slowest and longest lasting concert that is taking a total 639 years to perform.

The abandoned Buchardi church in Halberstadt, eastern Germany, is the venue for a mind-boggling 639-year-long performance of a piece of music by US experimental composer John Cage (1912-1992).

Entitled "organ2/ASLSP" (or "As SLow aS Possible"), the performance began on September 5, 2001 and is scheduled to last until 2639.

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