I heard the St. Helen found pieces of Christ’s cross when she searched the Holy Land. But maybe the was wrong…
I find that having a crucifix in a room (which I don’t but have been in rooms that do) gives me a feeling of protection as well. The same with the rosary, I usually have it beside me when I sleep. I feel protected. When I was a kid, I watched a really scary movie once and slept with my bible…I know that is not what these things are for but, I always feel better when they are around…you know what I mean?