Sure, except for coloration, traditional Bridal White. I have seen wedding gowns in the Empire style- that is cantilever strapless- no visible means of support, They are not that popular but do exist. often a very thin tulle or something shawl or capelet is worn over the shoulders- while in the church. the church has been known to have a (Wet Blanket) attitude about sexy fashions, and since matrimony is considered a sacrament, some dignity is apropo. They do not specifically ban Empire Gowns which are in the Formal style.