But. Why. Is. The Irene dimension. A CHURCH for IRENE HERSELF???
Irene is literally the only person who goes to there so why have a million seats in the chapel dedicated to yourself??
The ideas I currently thought of areee:
Irene found places like that quite soothing as they were typically quiet since everyone was busy praying to her
The dimension was at one time an actual church to Irene before she sent it to this dimension (that wouldn't have any negative consequences. None once so ever.)
Irene is egoistical.
Similarly to Aphmau praying to Irene in MCD season 1, Irene would sometimes pray to a stronger version of herself while in her dimension. Since the world idolized her so much, the strong and stoic persona she became for them started to seem separate from herself who couldn't even keep her love life together and so she prayed to it, like those around her did when they felt weak. She prays to the concept of Irene. (Why yes! I do have a favorite headcanon!)
She needed a place with strong ties to magicks or something to make a dimension, where was better than a church where people would worship and pray to a god-like lady
It looks cool