The Roman unique district says it provides extra bonuses "On Victorious City".  Can anybody identify what this means?  Is this just a city which has belonged to an empire which has won a single war (any war?)?  Does it last forever?  This is the kind of detail that I'd expect to find in the encyclopedia, but so far it has been less helpful than the tooltips every time I have gone looking for this kind of information.

When you win a war cities gain that perk which is by default +10 stability for the duration.

How long does it last?

Might change due to game speed but on endless it was 10 or 20 turns. I can't remember off top of my head sorry. After you do a war and if opponent surrenders be sure to check it on your cities.

Basically, don't plan on having it often unless you're planning on conquering the heck out of everything constantly. Romans seem pretty underpowered IMO.

if you don't plan on conquering you don't pick Romans anyway.

Faust wrote:

Basically, don't plan on having it often unless you're planning on conquering the heck out of everything constantly. Romans seem pretty underpowered IMO.

I think their emblematic district should be a common quarter with all the normal benefit of a common quarter in addition to what it give nows. It seems wrong to put the arch far away from your city center in a remote location just because it don't exploit resources or its placement don't mattter at all.