can’t ask my resident talmid chacham because he’s not available now but there was a special conveyance used to carry the kallah to the chuppa in yerushalayim. not clear if it was a carriage or a sedan chair. there are some poeple who are trying to revive the custom now in yerushalayim. all those learned people out there, jump in with the source.
also the kallah used to wear a crown too. one of the takanos after the destruction of the Bais Hamikdash was that Kallahs should no longer wear crowns and that is our minhag