According to Wikipedia, numerous organs have a stop labelled 64', and exactly two in the world have a true, open 64' stop (that is, have a pipe that is literall

According to Wikipedia, numerous organs have a stop labelled 64', and exactly two in the world have a true, open 64' stop (that is, have a pipe that is literally 64' long): https://en.wikipedia.org/wiki/Organ_stop#Notable_organ_stops https://en.wikipedia.org/wiki/Organ_stop#Notable_organ_stops