Well, some time ago, I played another RTW mod (maybe I.B.F.D.) and it used the following system:

- a city has its main temple/god
=> up to max. level, AND

- the same city can build "smaller" temples to ALL the other gods
=> up to level 2 and giving less boni than a "regular" temple.

I've found that an interesting idea.

T.

P.S. this is a cpoy/past of my answer to another thread.