In the Roman and Byzantine empires, bread and bread stamping had major commercial importance. Bakers had individual bread stamps, which promoted both pride in good loaves and accountability in bad ones. A bread stamp could be just about any design, and with so many people living throughout the empire, creativity and detail were appreciated. Eastern Orthodox churches became especially attached to the tradition, as it helped distinguish church loaves (made with specific religious practices) from regular daily bread, which at the time looked identical.
Although Byzantium (and its bread-making practices) collapsed in 1453, the Eastern Orthodox faith is still extremely important in Greece today. While a large portion of the country no longer practices Catholicism, an estimated 98% of the country identifies with the Greek Orthodox faith, and 71% reported that religion was important in their daily lives. Globally, approx. 4% of the world is Eastern Orthodox (making up approx. 12% of the global Christian population).
Bread Stamp Activity Guide