But since the Son of God, also without beginning or end, was made incarnate and revealed that He was God, Who came to earth for our sake, was made incarnate, truly suffered and was in thc likeness of God and the likeness of man, the seal and the bread itself should .symbolize both divinity and humanity. For this reason the bread should also be square. For the churches of the Old Ritualists, an eight-pointed cross is permitted. In certain churches and particularly in monasteries, as an exception the seal can depict a feast, an icon or a Saint especially revered in the locality. Prosphorae with such seals are usually intended for distribution to believers and is not used for Divine Liturgy.
Local practice does.