In the treasury of the royal palace may be seen many fine single diamonds, together with magnificent emeralds and sapphires of great value. The King’s and Queen’s crowns, resplendent with brilliants, are kept here, with others of older date which belonged to the former Counts Palatine. Among the relics are preserved the ancient diadems of Henry II. and his Empress Kunigunda of the date 1010; also, the orb and sceptre of the Emperor Charles VII., together with his crown. Prussia has but few diamonds, the policy of the Hohenzollerns having been adverse to the purchase of gems as baubles. Austria, however, is rich in diamonds, and possesses some extraordinary gems. The Imperial Jewel Office at Vienna contains a rare collection of great value. Here is preserved the famous Regalia of Charlemagne, which were buried with the great conqueror in his tomb at Aix la Chapelle. Barbarossa, in 1165, dared to violate the sanctity of this sepulchre, and removed the barbaric jewels, which are of great interest to the antiquary and the historian. For several centuries past they have been used at the coronation of the German emperors. The crown is a magnificent specimen of the art of the Middle Ages, and is ornamented with rough diamonds and other gems in their natural state. The crown and sceptre of Rudolph II. may be seen here. They are also adorned with uncut diamonds and gems, and were formerly worn by the German emperors elect on their entrance into Frankfort. The chains, collars, decorations, regalia, belonging to the dresses of the various Austrian Orders, namely, Golden Fleece, Maria Theresa, etc., and worn by the Emperor, exhibit a splendid collection of diamonds, topazes, emeralds, etc., unique in size and perfection. Here is also to be seen the famous yellow diamond known as the Florentine. It is in the form of a double rose with facets cut all around, and weighs 139¹⁄₂ karats. It is of a fine lustre, but of a yellow tinge, sufficient to impair the beauty of the prismatic reflections. The Emperor Francis, as Grand Duke of Tuscany, inherited the gem, which accounts for its presence in Vienna. This gem has been confounded with the diamond given to the Pope by Charles the Bold; but its history is very obscure, and its introduction into Europe is unknown. There is, however, a story among the Italians that it was first discovered by an amateur while hunting over the relics and objects of virtu in a curiosity shop at Florence, where it was regarded as a crystal of yellow quartz. Tavernier saw it in Florence in the middle of the seventeenth century, but does not mention its history. Besides this gem there are several large diamonds in Europe whose history has become very confused, and it is now difficult to trace their identity in several instances.