I`m a bit stuck on the sword level. I`ve done the level on expert mode but i`ve never been able to open three doors. the first is in the chapel type room in the gardens, looks like a storage room and the other two are down to the basement. not the basement door where you find the incriminating evidence on constantine but at the bottom of the stairwell. can anyone help, it`s driving me mad!!!

The basement can't be accessed during this mission.
As for the other, I don't exactly see what you're referring to, can you perhaps provide a screenshot ?