This medium-sized room of 156 m² is overlooked by a 25-m² gallery. The decor and furnishings are the work of Julius Maria Luthmann, the Dutch architect responsible for the office of the League of Nations Secretary-General. The work was done by Mutters of the Hague, as noted in the inscription in bronze-coloured lettering on the plaque next to the main door. The real leather used on the walls and the brass and macassar wood used in the beading and frames attest to the quality of the material selected and make for a harmonious ensemble.