But I remember that when Prince Felipe de Borbón (actual King of Spain) married the Greek Princess Sophia, they performed a GReek Orthodox wedding and a Catholic one. When they married the Greek Orthodox way, they used crowns, like it could be seen at the pics of the time. ..I don't know. Not being Orthodox myself, I don't know very much about different Orthodox Churchs, Of course, I know there are many "National Orthodox Churches" (Romanian, Bulgarian, Serbian etc...) But in the Greek case, I remember to have seen the crowns over the groom and the bride's head.
I think that the mean of this custom is that they consider the groom, the "king of the house" and the bride "the queen of the house", or something like this...But correct me if am I wrong.
RealAnastasia