The longest organ music concert in the world, John Cage’s ORGAN²/ASLSP As Slow As Possible, is playing for 639 years in the St Burchardi Church in Halberstadt in Saxony Anhalt, Germany. The slowest piece of music in the world, or the longest organ music concert ever written, is currently — and for the next six centuries or so — being played on a special organ in the … [Read more...]