Control of the Assembly was an important political post, since the conflict between Protestant and Catholic was mirrored by internal divisions among French Catholics. Some were theological, like the dispute over Jansenism, others political, such as resisting demands by the regional Parlements that the Church pay taxes or the re-admission of Assembly members expelled by Cardinal Richelieu in 1641. As a sign of his growing stature, in September 1649 he was made Archbishop of Embrun, a Roman Catholic Archdiocese in an area historically dominated by Huguenots. During the "Fronde des nobles" (1650–1653), the La Feuillade brothers supported the Court party led by Louis XIV's mother, Anne of Austria and Cardinal Mazarin. Georges was appointed President of the Assembly of Clergy in March 1651 and published an attack on Charles de Fiesque, a senior aide to Condé, one of the Fronde's leaders. He reaped the benefit of his support for the Crown after October 1652 when the Fronde ended in a crushing defeat for its leaders. He served as Ambassador to the Republic of Venice (1659-1661), followed by Spain (1661-1669), after which he was appointed Bishop of Metz, a position he retained until his death in 1697. This was an important and sensitive position; Metz had been occupied by French troops since 1552 but officially remained part of the Holy Roman Empire until ceded to France in the 1648 Peace of Westphalia. He also published a number of tracts backing the policies of Louis XIV, including measures against French Protestants that culminated in the 1685 Edict of Fontainebleau and the French claim to the Spanish throne. Allegedly senile in the last years of his life, a financial audit of the diocese after his death in 1697 showed that a large sum of money was missing. The report concluded this had been stolen by his nephew Louis d'Aubusson de La Feuillade; Louis XIV wanted to dismiss him from the army but a family connection, Louis de Pontchartrain, persuaded him not to do so. In his "Mémoires" written in the 1720s, Saint-Simon (1675-1755) describes the bishop as overly familiar and avaricious, although the accuracy of these comments is hard to assess. He was equally scathing in his assessment of François de La Feuillade, who died in 1691 when Saint Simon was 16 and in general, uniformly hostile to Louis XIV and his supporters, the majority of whom he dismissed as commoners.