César Antonovich Cui (Russian: Цезарь Антонович Кюи, tr. Tsézar Antónovich Kyuí, IPA: (About this soundlisten); French: Cesarius Benjaminus Cui; 18 January 1835 – 13 March 1918) was a Russian composer and music critic, member of the Belyayev circle and The Five – a group of composers combined by the idea of creating a specifically Russian type of music. As an officer of the Imperial Russian Army he rose to the rank of Engineer-General (equivalent to full General), taught fortifications in Russian military academies and wrote a number of monographs on the subject.