His works included poetry, essays, novels, biographies marked by their passionate tone, imagination, religious sentiment and attention to the detail.
In the period between the two world wars, Nothomb also came to prominence as the co-founder of several reactionary and near-fascist nationalist movements.
[1] Initially eschewing the Action Française tendency that was influencing Belgian Catholic thinking at the time Nothomb and his political ally Pierre Daye instead looked towards a republican nationalism.
[2] He would later write the occasional article for Rexist journals but did not commit to this group and also maintained good relations with Verdinaso leader Joris Van Severen.
As a post-war Senator he continued to advocate the expansion of Belgium's borders but became convinced that the most realistic method of achieving this would be through a wider programme of European integration which he publicly endorsed.
Other poetic and fictional works were inspired by the Bible, notably Vie d'Adam (1929), L'Égrégore (1945) and Le Roi David (1960).
A further series of novels, such as Le Sens du pays (1930), La Ligne de faîte (1945) and Curieux Personnages (1942) focused on his love of the Ardennes.