How do people remember which cities have the structures that give bonuses like stables of spring, or ?soul temples, or structures that give certain unit production bonues?

I have one city for example with the 2 pikemen bonues (eg a spire and something else), where I produce pikemen primarily.

Instead of having to constantly go into the buildings already built and scrolling through, is there an easier way to remember? Maybe renaming a city with a code?
What do people do?

Is there a mod that shows what's there? (ie. like the city spell buffs that come up on the side in the city view)

TIA