Political control of Öresund has been an important issue in Danish (and Swedish) history. Danish millitaty control was done from the coastal fortess of Kronborg? at Helsingør (Elsinore).
A bridge across the the sound was inaugurated in July 2001 by the king? of Sweden and queen? of Denmark.
See the official web site of the bridge builders, Öresundskonsortiet, at http://www.oresundskonsortiet.com/