such in Spain. In terms of jewelry, all of the jewels and tiaras worn by the members of the Spanish royal family are privately owned by them. More historically important elements are kept as pieces of cultural interest in different parts of Spain. For example, the personal crown used by Isabella I of Castile, her scepters, and her sword, are kept in the Royal Chapel in the Cathedral of Granada. As a consequence, this means that beyond the crown and scepter used during important occasions of the Spanish state, there is no other element of the crown jewels of Spain. Sweden Sweden's crown jewels are kept deep in the vaults of the Royal Treasury, underneath the Royal Palace in Stockholm, in a museum which is open to the public. The symbols of the Swedish monarchy have not actually been worn since 1907, but are still displayed at weddings, christenings and funerals. Until 1974 the crown jewels were also displayed at the opening of the Riksdag (Parliament). Among the oldest objects are the sword of Gustav Vasa and the crown, orb, sceptre and key of King Erik XIV and numerous other sovereigns. Turkey Ottoman Empire The Sword of Osman was used at the enthonement ceremonies of Ottoman Sultans. The Spoonmaker's Diamond sits in the Topkapi Palace. It is the palace's most famous exhibit and is the fourth largest diamond of its kind. The diamond is surrounded by myths of all kind. Süleyman the Magnificent's Venetian Helmet was a four-tiered papal tiara adorned with diamonds and pearls. It was crafted for Suleiman the Magnificent by Venetian craftsmen and Ibrahim Pasha, Suleiman's Grand Vizier, who helped commission the helmet through his patronage of Alvise Gritti. Engravings by Agostino Veneziano depict Suleiman in his towering headgear. Early in his reign, Suleiman shared a similar level of interest in the patronage of European arts as Mehmed II. Politically, the tiara helped to advance the Ottoman imperium through its Roman-like synthesis of the eastern and western mediterranean. As such, it was a symbolic challenge to Christian sovereignty and rule because it stood taller than the Pope's tiara (which only had three tiers.) Later, as Suleiman's reign began to take an insular turn, the tiara was thought to be donated or put to the wayside, and eventually lost. The Topkapi Dagger is a dagger crafted in 1747 as a gift from Sultan Mahmud I to Nadir Shah,