The cathedral is a key part in Kadish’s illusion that he is The Grower. It helps the illusion of traveling through time which Kadish had built up around the Age. Visitors to Ahnonay would use the Cathedral book in one of the spheres, this book sat upon a pressure plate trigger that when activated (by all the weight being removed) would rotate the spheres. The visitor would when Link back to Ahnonay via the book in the cathedral to find a new environment surrounding them, thus giving the illusion of time travel.
Later explorations revealed that the series of stained glass windows that flanks the corridor in the cathedral match those found in the Kadish Gallery in both pattern and order. These are actually a combination to the lock in Kadish’s quarters in the “real” Ahnonay.
The cathedral (or temple as some call it) is a simple long corridor, flanked by stained glass portholes and waterfalls. Its construction is of mostly metal and like Ahnonay, uses pressure plates to trigger the doors. The Age serves as an interim for Linking between Spheres in Ahnonay in order to give the impression of moving through time.
It is worth noting that the stained glass windows situated in the portholes are in the same order as those also found in the Kadish Gallery and serve as the combination to the door to Kadish's quarters in Ahnonay.
Ahnonay Linking Book
DRC Restoration Notes
Phase Five: Approval contingent on Ahnonay’s completion. 6.28.07