We followed the very sophisticated method of placing them wherever the previous homeowner already had nails in the wall. :smile:
In the main room, we put the crucifixes over doorways and other saint pictures on lower nails. In our room, the crucifix (was) over the head of the bed (until I moved the bed over to accommodate baby needs). In the children's room, it's on the most open wall with the oldest having his own above his bed.