The Serbian cross is a national symbol of Serbia, part of the Coat of arms of Serbia, flag of Serbia and the Serbian Orthodox Church. It is believed to be based on the tetragrammatic cross emblem of the Byzantine Palaiologos dynasty, with the difference that in Serbian use the cross is usually white on a red background, rather than gold on a red background (though it can be depicted in gold as well). It is composed of a cross symbol with four stylized letters S (С) on each of its corners.