Between 1444 and 1446 the king several times named him one of his commissioners to the estates of Languedoc and for the installation of the new parliament of Toulouse.

In 1446 he formed one of an embassy sent to Italy to try and acquire for France the possession of Genoa, which was harassed by civil dissensions.

In 1447 he received from Charles VII.

a still more important commission, to bring about an arrangement between the two popes elected, one under the name of Felix V., and the other under that of Nicholas V.; and he was successful.

His immense wealth greatly contributed to his influence.