I didn't read it, I've seen something of the sort for early temples. Not sure it's quadruple. Just know it's more than double.
and old monasteries 14 since the +5
per turn you get from the Sistine Chapel for all state
buildings is also subject to the doubling effect you get for buildings that are older than 1000 years. There's no quadrupling.
My basic rule of thumb is that if I have to drop below 30% science, I might need to consolidate a bit before I expand more.
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