I'm looking for an item, but I don't know which search term to go with..
Quite a while back, I stumbled upon a room that had a coliseum-like architectural structure. It was large and rounded with ridges. It was really beautiful, but I haven't a clue the search term to type in to find it. I have an idea for a room design featuring it, if I could only find it. If you have any idea what I'm talking about, please help me out! Sorry for the vague description. Thanks, loves.