strange dream about a cross mosaic (illus.)

 I'm in a Catholic church courtyard. I've never been Catholic, but in the dream I'm strangely drawn to a mosaic in the floor of the courtyard that's of a simple cross.

I start doing some ritual (that seems strange to me now that I'm awake) where I'm running my finger back and forth over the cross part.

My mother appears briefly in one of the arched doorways along the side, and the look on her face seems to indicate approval of what I'm doing (she did grow up a Catholic). But she's in a hurry and has to leave.

I wake up.