a mid-seventh-century Georgian cathedral (rebuilt at the turn of the ninth and tenth centuries) located in the historically Georgian region of Tao. (Now on Turkish territory, Bana is preserved in ruins.)

Bana is a typical example of the circular, multistory cathedrals of Transcaucasia. It is a tetraconch (with triple-tiered choirs in the supports under the cupolas and arcades in the lower part of each apse) enclosed within a circular structure (with a diameter of 37.45 m) whose facade is decorated with arcades.