Career
An Orangist, he twice served as Minister for Justice, in the governments of Victor de Tornaco (1864 – 1866) and Emmanuel Servais (1867 – 1874). After his second stint as President of the Council of State, he became Luxembourg"s chargé d"affaires in Paris. Throughout this period, he formed a close connection with Paul Eyschen and Mathias Mongenast, thanks in no small part to all being from the town of Diekirch.
There is a street in South Bonnevoie, Luxembourg City, named after Vannérus (rue Henri Vannérus).