For centuries, civilizations have built citadels (walled fortresses) to defend their people from invaders.  Some of these, such as Jerusalem, were as big as a city.  This work, which draws its strength from pounding quavers, biting chords and rhythmic inflexions, explores the imagery of a strong, passionate yet fiercely protective community.  The middle section, featuring quietly bowed tremolos and ominous pizzicato, creates the atmosphere of a still yet edgy night.  The main theme returns with even greater strength and resolve which eventually diminishes as the invaders recede.