The Christian emblems that figure in the celebration of the Eucharist, or Lord's Supper, were probably derived from the ceremonies of the Passover eve. The bread employed in the Eucharist is with some Christian sects unleavened, and, indeed, leavened cakes seem to have been introduced solely as a protest against certain so-called Judaizing tendencies. The Latin Church still contends for the propriety of employing unleavened bread, and from the seventh century unleavened bread was used at Rome and leavened bread at Constantinople. From the earliest times, however, the Eucharistic loaves were invariably round in shape, there being, indeed, a supposed edict by Pope Zephyrinus (197-217) to that effect. It is passing strange that Bona, an ecclesiastical writer, derived this roundness from the shape of the coins Judas received for betraying his master. But though there is no distinct enactment either in the Talmud or in any of the later codes as to what the form of the Matzoth must be, these have been from time immemorial round also. Some Minhagim are more firmly rooted than actual laws, and this custom is one of them. In one of his cartoons, Picard has an illustration which is apparently that of a squarish Matzah; this may, however, be only a case of defective drawing. It is true that in Roumania square Matzoth are used, but in the controversy raised by the introduction of Matzah-making machines, the opponents of the change argued as though no other than a round shape were conceivable. Kluger, for instance, never seems to have realized that his weightiest objection to the use of the machine would be obviated by making the Matzoth square or rectangular. When it was first proposed to introduce Matzah machines in London, the resistance came chiefly from the manufacturers, and not from the ecclesiastical authorities. The bakers refused categorically to make square Matzoth, declaring that if they did so, their stock would be unsalable. Even to the present day no square Matzoth are baked in London; those occasionally seen there are imported from the Continent. The ancient Egyptians made their cakes round, and the Matzoth are regarded Midrashically as a memorial of the food which the Egyptian masters forced on their Israelite slaves. A round shape is apparently the simplest symmetrical form, but beyond this I fancy that the round form of the Passover bread is partly due to the double meaning of Uggoth Matzoth. The word Uggoth signifies cakes baked in the sand or hot embers; but Uggah also means a "circle." To return, however, to the Eucharistic wafers.