When Bologna declared its independence from the Papal States, he was sent to Paris by his fellow-citizens.

He was a member of the council of ancients in the Cisalpine Republic, and was held in much esteem by Napoleon, who created him a count and made him secretary of state to the Kingdom of Italy.

In 1814 he was sent together with Vincenzo Berni degli Antoni to the Congress of Vienna, to lobby on behalf of the Papal Legations.

[1] In May 1815, he was granted an audience with Metternich to beg that Ferrara, Ravenna and Bologna be annexed by the Austrian Empire.

After the re-establishment of the former rulers in Italy, Aldini resided in Pavia until his death, on 30 September 1826.