The two-barred cross in the Slovak coat of arms originated in the Byzantine (Eastern Roman) Empire in the 9th century. Unlike the Christian cross, the symbolism and meaning of the double cross is not well understood. One interpretation is that the first horizontal line symbolized the secular power and the other horizontal line the ecclesiastic power of Byzantine emperors. Another that the first cross represents the death and the second cross the resurrection of Jesus Christ. In the Byzantine Empire of the 9th century, the double cross was a political symbol used by Byzantine clerks and missionaries.