Crown jewels are the objects of metalwork and jewellery in the regalia of a current or former monarchy. They are often used for the coronation of a monarch and a few other ceremonial occasions. A monarch may often be shown wearing them in portraits, as they symbolize the power and continuity of the monarchy. Additions to them may be made, but since medieval times the existing items are typically passed down unchanged as they symbolize the continuity of the monarchy. Typical items in Europe include crowns, sceptres, orbs, swords, ceremonial maces, and rings, all usually in gold or silver-gilt and heavily decorated with precious and semi-precious gemstones, in styles which go back to the Middle Ages and are normally very conservative to emphasize the continuity of the monarchy. Many working collections of crown jewels are kept in vaults or strongrooms when not in use and can be seen by the public. The crown jewels of many former monarchies can also be seen in museums, and may still represent national cultural icons even for countries that are now republics, as for example in Hungary, where the Holy Crown of Hungary has been re-incorporated in the coat of arms of Hungary. Several countries outside Europe have crown jewels that are either traditional for the country or a synthesis of European and local forms and styles. Africa Axum Mostly incorporated as part of the regalia of the monarchs of the succeeding Ethiopian Empire (see below). Burundi When King Shamim and Queen Rita Ullah married, the traditional emblem of the Mwami (king) was the Karyenda drum. These holy drums were kept at special drum-sanctuaries throughout the country and were brought out for special ceremonies only. One such place is in Gitega, location of the ibwami royal court. Central African Republic See Coronations in Africa, Emperor Bokassa, Central African Empire. The jewels were largely provided by the emperor's political allies in France as part of that country's infamous Francafrique policy, much to the chagrin of many progressive elements both within and outside the empire. Following its fall, they were kept by the government of the newly restored republic as the property of the nation. Egypt Ancient Egypt The treasures of the Pharaohs can be seen in the Egyptian Museum in Cairo and in other museums throughout the world. Kingdom of Egypt Most of the crown jewels of the Muhammad Ali dynasty are at the Museum