From the 16th to the 18th centuries, the Dukes of Savoy surrounded Turin with a "crown" of residencies. The Palazzo Reale, today houses ceremonial swords and weapons, while the shroud of Turin is kept in the adjoining cathedral of Saint John the Baptist. The Reggia di Venaria, which was formerly a barracks during Bonaparte's conquest of Italy, has been renovated, narrowly escaping ruin.