Traditionally we are not supposed to have sex before marriage either but I am yet to meet a virgin bride. Yes, even in Italy. So why stick to other traditions when an alternative will really ease the stress off of your day.
By doing your pictures beforehand means that you will have much more time to enjoy your party. A party which has the limitation of time. I recommend shooting as many of the family and couples portraits as possible, before the ceremony. That way we can spend fifteen minutes in the sunset light taking great portraits and any groups not taken before. If anything goes wrong from rain to a bride twisting her ankle, it’s mostly done. And if nothing goes wrong all the more time to shoot gorgeous reportage images.