The term "(My) Roman Empire" is commonly used as a way of saying something that you think about often.
Origin: In 2023 there was a trend where women would ask the men in their lives how much they thought about the Roman Empire. With this trend people started to see that a lot of men happen to think about the Roman Empire quite often. Most of the men being asked this ended up answering that they thought about the Roman Empire at least weekly, some men even saying they think about it daily. Women then started to wonder what their 'Roman Empire' was, what was the thing that they thought about a lot. 'Roman Empire' has taken on a whole different meaning. Now people will say 'my Roman Empire' when talking about something they think about often.