Trumeau, in architecture, is the central pillar or mullion supporting the tympanum of a large doorway, commonly found in medieval buildings. It is often sculpted.
Drawing of a trumeau from the Vézelay Abbey
Romanesque trumeau at the Tarragona Cathedral
Central porch, north facade, Chartres Cathedral
Gothic trumeau at the Reims Cathedral
Trumeau of the main portal of Saint-Lazare Cathedral
Trumeau of the main portal of Aix Cathedral
Trumeau of the main portal of Saint Martin's Church, Arlon