Orthodox cross, is a variation of the Christian cross known from the 6th century in the Byzantine Empire. The cross has three horizontal crossbeams and the lower one is slanted. Other names for the symbol include the Byzantine cross, the Russian cross, and the Slavonic or Suppedaneum cross.

The cross has three horizontal crossbeams — the top one represents the plate which in the older Greek tradition is inscribed with a phrase based on John's Gospel The King of Glory, but in later images it represents INRI, and the bottom one, a footrest. In many depictions, the side to Christ's right is higher. This is because the footrest slants upward toward the penitent thief St. Dismas, who was crucified on Jesus' right, and downward toward impenitent thief Gestas. It is also a common perception that the foot-rest points up, toward Heaven, on Christ's right hand-side, and downward, to Hades, on Christ's left.

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