Glücksbierg

Duke of Decazes
Arms of the Dukes of Decazes
Creation date	1780
First holder	Élie Decazes, 1st Duke of Decazes and Glücksbierg
Present holder	Louis-Frédéric-René-Marie-Edouard Decazes, 6th Duke of Decazes and Glücksbierg

Duke of Decazes (French: duc Decazes) is a French noble title first given to Élie Decazes, Count of Decazes, who was granted the Danish title Duke of Glücksbierg in 1818, which was recognized in France in 1822. A lawyer and judge, he served as Prime Minister of France from November 19, 1819 to February 20, 1820. In 1826, he founded Houillères et Fonderies de l'Aveyron, a mining and metal working business in the Aveyron département that marked the beginning of industrialised metallurgy. In 1829, the name Decazeville was given to the principal centre of the industry.