How do you buy a temple in Fable 2?

you can only buy 1 of them the temple of shadows or the temple of light to buy the temple of light you have to complete the defender of the light quest and once you come back from the spire go to the temple of light in will be a better place and you can buy it for 100,ooo gold the temple of shadows im not sure about if anybody knows for sure please post how to buy the temple of shadows as a comment