<Li> The oldest (complete) surviving church organ in the UK is that by Renatus Harris in St Botolph's Aldgate, and dates from 1744 . </Li> <Li> The Organ Historical Society maintains a citation list of historic North American organs . </Li> <Ul> <Li> The largest pipe organ ever built, based on number of pipes, is the Boardwalk Hall Auditorium Organ in Atlantic City, New Jersey, built by the Midmer - Losh Organ Company between 1929 and 1932 . The organ contains seven manuals, 449 ranks, 337 registers, and 33,114 pipes . It weighs approximately 150 tons . Most of the organ has not functioned since 1944; a partial restoration in 1998 was largely reversed by construction damage during a renovation of the Boardwalk Hall shortly afterwards . Parts of the organ are again being restored to playing order in a $16 M restoration effort that is expected to be completed by 2023 . As of 2015 as much as 20% of the restoration is completed and, if financial support continues, as much as 50% of the restoration may be completed by 2016 . This project has been completed to the extent that public concerts have resumed . <Ul> <Li> It contains the world's largest Diaphone, the 64 ′ Diaphone - Dulzian in the Pedal Right Division, which is also one of only two full - length 64 ′ stops in the world . </Li> <Li> The Grand Ophicleide (organ stop) in the Pedal Right Division, speaking on 100" wind pressure, is also recognised by The Guinness Book of World Records as the loudest organ stop in the world . It is described as having "a pure trumpet note of ear - splitting volume, more than six times the volume of the loudest locomotive whistle". In fact, the Grand Ophicleide produces 130 dB at 1 meter distance . </Li> </Ul> </Li> <Li> The Wanamaker Grand Court Organ at Wanamaker's department store (now operated by Macy's) in Philadelphia is the largest functional organ, the second largest organ based on number of pipes, and the largest based on number of ranks and physical mass weight . It is the largest operational musical instrument in the world, with six manuals, 464 ranks, 401 registers, and 28,750 pipes; it weighs 287 tons . The organ was initially constructed by the Los Angeles Art Organ Co. for the 1904 World's Fair in St. Louis; it was designed by George Ashdown Audsley . The organ was purchased by John Wanamaker for his large new Philadelphia store; disassembled, the organ filled 13 rail cars . Uniquely, the Wanamaker Organ had from the beginning full - time organ fabricators and technicians, a true "organ shop," building it to luxurious standards of quality . They expanded the organ in 1914--1917 and again in 1924 - 1930 . It is played twice a day, six days a week, and there are many recordings of this organ . </Li> </Ul> <Li> The largest pipe organ ever built, based on number of pipes, is the Boardwalk Hall Auditorium Organ in Atlantic City, New Jersey, built by the Midmer - Losh Organ Company between 1929 and 1932 . The organ contains seven manuals, 449 ranks, 337 registers, and 33,114 pipes . It weighs approximately 150 tons . Most of the organ has not functioned since 1944; a partial restoration in 1998 was largely reversed by construction damage during a renovation of the Boardwalk Hall shortly afterwards . Parts of the organ are again being restored to playing order in a $16 M restoration effort that is expected to be completed by 2023 . As of 2015 as much as 20% of the restoration is completed and, if financial support continues, as much as 50% of the restoration may be completed by 2016 . This project has been completed to the extent that public concerts have resumed . <Ul> <Li> It contains the world's largest Diaphone, the 64 ′ Diaphone - Dulzian in the Pedal Right Division, which is also one of only two full - length 64 ′ stops in the world . </Li> <Li> The Grand Ophicleide (organ stop) in the Pedal Right Division, speaking on 100" wind pressure, is also recognised by The Guinness Book of World Records as the loudest organ stop in the world . It is described as having "a pure trumpet note of ear - splitting volume, more than six times the volume of the loudest locomotive whistle". In fact, the Grand Ophicleide produces 130 dB at 1 meter distance . </Li> </Ul> </Li>

Where is the world's largest pipe organ located
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