 Some remained in Paris and several entered the collection of Ludwig I of Bavaria.On 20 May 1817 he was appointed Prefect of the Congregation for Bishops and Pius VII made him a cardinal in 1818, assigned the titular church of San Cesareo in Palatio.In the conclave of 1823, he presented the veto against the election of Cardinal Antonio Gabriele Severoli on behalf of Emperor Francis I of Austria.