Preflight check, the three selected cities are doing well, with Lillehammer at 380 cpt, and it's the weakest one. Tuscany and Venice are producing much less culture, due to the lack of cottages. Venice has got a lot of sea, but it just can't compare with a fully developed cottaged city, sadly for me

Tuscany is even worse, as a production-oriented city it only has 210 cpt at 100% culture.
(0) There are a couple things I don't like. First of all, as T-Hawk said, steam power before the Hagia Sophia is not a good thing. Research swapped to physics. I'm going to leave the wonder there, as in Lillehammer (actually building the Globe in 4) and in Straussburg (currently on Wall Street, 17), it would take about 20 turns to complete. In my opinion, we'll just lose the wonder if we change the city now.
Then, about civics and diplomacy: we don't need the pacifism boost anymore, and since we'll be building a fair number of defence troops from now on, that is a weak choice IMO. On the other side, freedom of religion grants us one more culture point from the religion, and allows for some friendship with other civs. We're going to make use of the Wall Street right?
So, first action of my turn, I gift corn and silk to Izzy. When I'll swap to freedom of religion, with tech gifting we can make it to -1. Some trade plus could be critical for the OB. Then I dial up Mansa... He's giving us dye (which we won't need anymore) and banana (which we stole away from him culturally), for two happiness resources. Mansa's biggest city is size 14. I cancel those deals.
Sorry about that!

It seems I'm cancelling deals left and right whenever I start a turn. Last time it was not a good move...
Umm, so, let's go.
(1) We have 20 million souls. Straussburg is microed, it wanted an engineer instead of a fisher

. We're bleeding money like no one, and still building more military! *Tuscany is starting a grenadier*
(2) (3) Well...
(4) Lillehammer finishes the Globe, starts the Jewish Synagogue (argh). The fourth golden age ends, so I swap to freedom of religion! And dial up Izzy... Sell her Nationalism for 270 gold, and a +3 relationship. She's still -2 overall... we definitely need some trade plus with her.
(5) The government is re-established, and workers continue to work. In fact, I was about to chop down the two forests in Lillehammer, then luckily I realized the city needed that wood for health.
(6) ...
(7) W00t!
[IMG="http://img476.imageshack.us/img476/1354/izzy1xj2.jpg"]http://img476.imageshack.us/img476/1354/izzy1xj2.jpg[/IMG]
What more could I ask for? Of course I accept, and happily take the diplo bonus, which brings her to cautious level!
[IMG="http://img476.imageshack.us/img476/5002/izzy2xx4.jpg"]http://img476.imageshack.us/img476/5002/izzy2xx4.jpg[/IMG]
Of course, you had to see it coming... the boat with the missionaries has already started its journey.
(8) Hagia Sophia BIDL...
[IMG="http://img226.imageshack.us/img226/4861/nohsdk3.jpg"]http://img226.imageshack.us/img226/4861/nohsdk3.jpg[/IMG]
If I had started the last GA right when the fourth one stopped, we'd have built the wonder! The loss is converted into about 350g, however, so it's still very good. One group of workers cottages over a farm in Straussburg, blocking the irrigation chain which brought one more food to Venice.
[IMG="http://img226.imageshack.us/img226/8085/noirrigationga9.jpg"]http://img226.imageshack.us/img226/8085/noirrigationga9.jpg[/IMG]
I have to reduce the amount of scientists in Venice, but there's more culture in Straussburg now.
(9) The first converted city is Santiago.
(10) I convert Barcelona and Valencia, too. Caesar is piling up money in his wallet, we can gain a lot of money for culture selling him techs.
Here I finish, hoping to have stopped all go-to orders for the next player

. The three legendaries fare well, with Cornelia flying away, while the other two cruise above 350 cpt outside of GAs. This is going to get better as the cottages improve. Watch out for starvation problems, as both Venice and Straussburg have 1 surplus food. Four missionaries are needed to convert the whole of Spain, by that time I hope Caesar will agree to open his borders again. He's pleased now, but wants to wait some more time... Remembers me of Cathy
Umm, consider cottaging over the iron mine in Straussburg? Also the ivory can be cottaged over, in Lillehammer. Also, pick steam power. I forgot to do it when we lost the Hagia Sophia

.
Here's the save, have fun.
@ Zakalwe: that would be awesome, but I'm pretty sure it's impossible to achieve that this late in the game. Especially since the two rejected cities don't have nearly as much commerce potential as the three legendaries, so they will never catch up.