So today I learned about John Cage's wackiest composition: Organ2/ASLSP (As Slow as Possible). Written in 1987, it is currently being performed an organ in Sankt-Burchardi-Church in Halberstadt, Germany. The performance started on September 5, 2001, with a rest lasting until February 5, 2003, when the first chord played. The next note of the piece will be played on February 5th, 2022. At this rate, the performance will not end until September 5, 2640. The duration marks the 639 years between the first documented permanent organ installation in Halberstadt Cathedral, in 1361, and the proposed start date of 2000.