>>722944242
The Threefold Melody was created to put extra locks on Granny Silk, it's not for pilgrims.

Originally, the pilgrimage was a holy exercise for bugs to reach the Citadel. Before it became all high-tech, the Citadel was a stone city, but then Grand Mother Silk came along and did what Pale King did, except while also trying to mindcontrol everyone. She then gets sealed in her cocoon, and to prevent anyone from breaking her out, a 24/7 Chorus was created to keep her in a trance-like sleep and The Cradle was sealed. You need to blessing of the Architects, Conductors, and Vaultkeepers to access the Cradle, which is why you need to find all 3 so you can go slap Grand Mother Silk's fat ass around.

By the way, that's the major piece of evidence backing up the "Conductors were the ones kidnapping weavers" claim, since all of the cages the weavers were brought in were in The Cradle with the only Conductor left alive to produce their part of the Threefold Melody being Conductor Ballador in High Halls.