The enormous instrument — 28,750 pipes, 287 tons and snaked throughout the building — isn’t going anywhere. But Macy’s is, closing its showpiece store at 13th and Market Streets for good Sunday.

Built in 1904 for the St. Louis World Fair, The Wanamaker Organ is a National Historic Landmark. Considered the largest fully-functioning organ in the world, it’s composed of more than 28,000 pipes, which are stored in various parts of the building.