This "magic" number is not exactly 6, this number depends on world size. Must-have is how many cities is needed to build Oxford and WallStreet national wonders.
one thing i was wondering, does this requirement change for OCC games?
yes. in OCC pre-bts, you can build every national wonder so long as you have that building in the city (ie. one theatre lets you build Globe Theatre)
post-bts, you can build a maximum of 5 national wonders, opening up some interesting choices (GT, OU are a must. but what about NP and IW?)
I like to think more along the lines of "20 city magic".
You also need 3 Temples for each Cathedral, so having at least 6 cities is a good idea for a cultural victory (you might not need them in your capital)
HE requires level 4 unit
It does?
IIRC, it's West Point which requires a level 6 unit.
on standard map, it's 3. It's on small, tiny or duel map that you need 2.Actually on a Standard map you need 2 temples for each Cathedral. The 6 cities magic number comes in action here as you will most likely need a Cathedral in each of the three most cultured cities of yours if you aim at a cultural victory. Cathedrals give 50% culture which is a great help in such an endeavor. Ideally you will have more than one religion so you make sure you spread them all to all of your cities and build one temple for each religion in each city allowing you to build more than one Cathedral in each of the 3 culture centers of yours.
make that 30 and you have my vote![]()
As many as possible. Good if their names are exotic.