 Complete the following phrase:  A Colonel dÉtat-Major of the National Guard, he supported the coup détat of 2 December 1851. Made a free member of the Académie des Beaux-Arts on 19 November 1853, on 5 July 1853 he became intendant des Beaux-Arts of the Emperors Household and finally in 1870 surintendant of the Imperial Museums. Until the fall of the Second French Empire, he played a highly important rôle, acting as a kind of minister of cultural affairs. It was at his request that the painter William Wyld of English birth but resident in Paris was allowed to exhibit in the French section of the 