Allowing a city to produce two things

[NumbersLetters]

I'm trying to make a new civilization (Atlantis) and there special ability would be that their capital can produce two things simultaneously.

Is this possible and if so how would I go about doing it?

 

[Genghis.Khan]

It would be overpowered IMO, but I think that it is probably the way you wanna do, since it is Atlantis.

Anyway, a way to do it is to Add a Free Unit/Building (that includes Wonders since wonders are buildings - not sure about processes/projects) when the production time is over. Not sure about the UI Part, but I think that could be figured out