Actually, the IW city was that one that ranges into Roman (red) territory in the north. There was once my only source of coal and I started building IW with about 40 turns for completion (the FP got ready in the neighbouring city in the south a few turns later, speeding things really up). Of course, that (formerly only) source of coal disappeared two turns later.

Fortunately, IW was already ordered.
But the core was indeed great: 4 of the shown cities are actually (as the screenie was taken) in the top5 (Bab's capital interferes on #2 w/ Leo's, Copernicus, Hanging Gardens and another wonder - GW IIRC). I was able to build Collossus, Sistine, Bach, Smith, Newton, Magellan, US, ToE, HD, UN (plus *owning* Sun Tzu, Pyr, G. Lib.) until the screenie was taken, w/o leader rush (I got only one before 1700AD, forming an army). Never had such a fine game on emperor w/ Zulu; all other civs here, even the Babs, were
in awe of Zulu culture before around 1000 AD.
IMHO the Zulus are the most difficult civ -if you don't impi-rush-, their traits are the worst (or I don't use them well), but I guess no civ will prevent my cultural victory.

Ok, ok, I stop here my spammy never-ending-story-telling now...
