Career
Because of his beliefs, d'Ester joined the Cologne chapter of the Communist League. In 1848, he was elected as a deputy to the Prussian National Assembly where he caucused with the Left-wing deputies of that assembly. D'Ester played a prominent part in the Baden-Palatinate uprising in 1849.
Following the suppression of that uprisinge, d'Ester emigrated to Switzerland. He died in 1859.