I started this game with a plan in mind.
1 - To get a culture victory on Deity even in the CHEESIEST manner imaginable.
2 - To compare a victory time with One City as opposed to two, three, four and then five Cities. To accomplish these targets, I knew it would have to involve stagnating the AI civ thus enabling me to build all the Wonders in one City (they don't build any when they are loosing military units from the offset, and their Cities are under threat).
3 - This is going to take me about Eighty hours to complete, but I for one will be very interested to see the outcome. Mathematicians like vexing would be able to give me an answer, but I don't understand all the mathamatical jargon, anyway I am a "sad old git" and I enjoy doing things like this!
As a side note - I didn't expect to be able to build a Citadel right next to their Capital, and I certainly didn't expect their units to die after four turns.
I have no advanced options enabled, no world builder and no mods. When I have finished all of this I might try the same with Policy saving enabled!
I fully realise this is a totally ridiculous way to get a Deity culture victory, and in my own mind I don't count it as such. I took this as purely experimental to find out just what it would take to get one in normal circumstances!
Game with One City.
Finish time July 1908 - City size 35 - Total culture 665 - Total Science 300 of which only 48 from three City States (I had the Patronage Policy Tree).
Breakdown of Culture -
Capital - 549 (this would not be possible without "all" the wonders).
2 puppets - 18
Excess happiness - 20 (I could never have got the wonders to have this much excess happiness in normal circumstances).
City States - 78 (under normal circumstances I couldn't have competed to be Ally to these unless allied first and then at war for the whole game)!
I built seven Landmarks and before they were placed I had Moai's in those locations.
I built every World Wonder as far as the Science took me, however I didn't build the Sydney Opera House (it came just too late).
The two puppets refused to use hexes where I built a Moai, neither of them built a temple and the only reason they had us much as eighteen culture between them was because I completed the Honor Policy Tree.
I would guess I was taking out a barbarian every three turns for the duration of the game, this would have made a difference but to what extent I couldn't really say (I took honor first).
This is what I have learned -
No wonder I havn't been able to win a culture victory post patch with one City playing non aggressive!
Four City game (started building the other three from the time of the screen shot)
Finished - Jan 1903
Science 558 (nearly double)
Culture - 1041
Capital 631 (Sydey Opera House is the difference).
3 Cities 299
City States 78
Puppets 17
Excess hap 16
I probably should have played from the start, but I can see what the difference would be if I took the correct Policies at the correct times! Using Policy Saving would also make a big difference although for me it is a last resort.
note - This has been an eye opener for me and I hope it might be useful for atleast one other person.
EDIT:
Added screenshots