Challenger, cultural victory 1774 AD.
I downloaded the save 14 hours before the deadline, and submitted it 10 hours before the deadline. Played the whole game in a single session.
Settled in place and built two warriors, waiting for those challenger barb warriors that never appeared. Strange also to start already having contact with Sitting Bull, but I guess this has been covered in the first spoiler thread (haven't looked there yet). I then used those warriors to take out our neighbour (Gilgamesh?, can't remember...

) and get that nice GP farm with a worker to go with it. Settled some more cities, grabbed three religions (Conf, Tao and Islam) and put up a lot of cottages. Uruk switch back and forth between building cultural wonders and running the full complement (7-8) of artists. London, Uruk, and Hastings (built in the jungle SE of Uruk with the copper, marble, pig, and sugar) became my three legendary cities.
Uruk spawned 11 Great Artists and 2 Great Prophets (Oracle influence), London spawned one GA (from Music) and one GP (Stonehenge, why did I ever build this?

), Nottingham spawned two GS (this was a mistake, I didn't notice that two scientists had been assigned in addition to the two GL scientists I had there)
I assume that I am centuries behind jesusin and the other experts. But the date is the best out of my three or four cultural victories ever in Civ.
Some things I could have done better:
- Build a worker much sooner. I was fooled by the challenger "handicap". I should have been working the gold much sooner and could probably have grabbed some of the early religions.
- Early REX was way too slow. I got Hastings up and running very late.
- Too many non-artist Great People.
- Probably my research path was very non-optimal for a cultural victory.
Still, it was a fun and short! game.