 Kings of Norway used many additional titles between 1450 and 1905, such as King of the Wends, King of the Goths, Duke of Schleswig, Duke of Holstein, Prince of Rügen, and Count of Oldenburg.They called themselves "Konge til Norge" ("King to Norway"), rather than "Konge af Norge" ("King of Norway"), indicating that the country was their personal possession, usually with the style "His Royal Majesty".With the introduction of constitutional monarchy in 1814, the traditional style "by the Grace of God" was extended to "by the Grace of God and the Constitution of the Kingdom", but was only briefly in use.