Do you need to buy tickets in adnance for the cathedral?
*advance. Per RS guidebook it doesn’t mention this. Just need clarification if anyone knows
No, you don't need to pre-buy tickets. Just pay at the door.
No. Onsite works fine.
You buy the tickets in the store across the street from the main entrance. There was no appreciable line when I was there in March. I really enjoyed the Cathedral interior, especially the main altar surrounding wall artwork and the choir seating area woodwork. Enjoy!
Thank you all