“The world’s largest operating musical instrument” is in a Macy’s in Philadelphia. Now with 28,543 pipes ranging in size from an inch to 32 feet, the original (still massive) configuration helped to bankrupt the Los Angeles Art Organ Company who created it for the St. Louis International Exposition in 1904. Purchased by the Wanamakers for the store they opened in 1911, the organ passed through several changes in store ownership and became Macy’s property last year. With a curator and organist on staff, Macy’s takes full advantage of this showpiece in their local marketing efforts.