Theresa Theroy *spoilers!*
Theresa is the REAL villain of the game!
-She says the spire is hers at the end of the game!
-If you talk to Mungo you can find out she gave him the music box he sold you at the start of the game. why didn't she just give you the box herself instead being sneaky?
-(Warning: RANT -> Maybe the dog is her minion. It shows up the day she does, it leads you along, it knew before you that you where coming home from the spire so it's psychic too, and dogs don't live 50 years so it's unnaturally old too.)
-If you read Lucien diary you find out that she told him about the spire. Can you think of a reason why she would tell a powerful very unstable man who just lost his wife and child about the spire? Theresa didn't go telling some beggar about it, she picked the (if you go by houses) riches guy in the world. If anyone could build the spire it would be Lucien. I wouldn't be surprised if she caused the death of his wife and child.
-Being able to see into the future, she orchestrated the whole even from start to finish (even though I don't thinks it's finished, can you say Fable3 bad guy :p ).