Prosphora
προσφορά — prosphora · pross-foh-RAH
In brief
Prosphora — Greek for "offering" — is the leavened bread baked and brought by the faithful for the Divine Liturgy. Each loaf is stamped with a seal reading IC XC NI KA, "Jesus Christ conquers"; from the sealed center the priest cuts the Lamb, the portion that will be consecrated as the Body of Christ. Made of nothing but wheat flour, water, salt, and leaven, it is ordinary risen bread — which is exactly the point: the Church offers God our daily food, and He gives it back as the Bread of Life.
Bread that someone brought
Prosphora is simply the Greek word for "offering," and the name preserves the oldest fact about the Eucharist: the bread on the altar does not appear from nowhere. Someone mixed flour and water, kneaded, baked, and carried a loaf to church. In the early centuries the faithful brought bread and wine from home and the clergy set apart from those gifts what would be offered; the loaf's name still remembers that procession of ordinary generosity. In many parishes today the loaves are baked by parishioners — often with prayer kept while baking — and handed in before the Liturgy along with lists of names to be commemorated.
The recipe is deliberately plain: wheat flour, water, salt, and yeast — nothing else. No milk, eggs, sugar, or oil enrich it; the offering is bread itself, not pastry. In Slavic practice each prosphoron is baked in two stacked layers, which the tradition reads as the two natures of Christ — God and man in one loaf.
The seal
Before baking, the top of the loaf is stamped with a carved wooden or metal seal. The most common seal is a cross within a square, the four quarters bearing the letters IC XC NI KA — the Greek abbreviation of "Jesus Christ" over the word nika: "Jesus Christ conquers." That sealed center is what the priest will cut out with the liturgical spear at the Proskomedia, the quiet service of preparation before the Liturgy: it becomes the Lamb, the portion consecrated as the Body of Christ. Larger seals add a triangle for the Theotokos and nine small triangles for the ranks of the saints, so that one stamp maps the whole company that will be arranged on the diskos.
The number of loaves differs between traditions — Slavic use commonly takes five smaller loaves, a number the tradition connects with the five loaves of the Gospel multiplication, while Greek use commonly takes one larger loaf. The grammar is the same everywhere: from bread the Church offers, God gives back His Son.
Why leavened bread
Orthodox prosphora is always leavened — risen bread, alive with yeast. The ordinary Greek word the New Testament uses for the bread of the Supper, artos, most naturally means a raised loaf, and the Church has always heard the symbolism gladly: leaven works secretly through the whole lump, as Christ said the kingdom of heaven does, and a risen loaf is a quiet image of the Risen One. Even the Law's thanksgiving sacrifice was offered with leavened bread.
Here East and West bake differently. The Christian West came to use unleavened wafers, looking to the Passover matzah of the Last Supper; the East continued with leavened bread. In the eleventh century this difference — the question of the azymes, "unleavened things" — became one of the grievances exchanged between Rome and Constantinople in the disputes around 1054. Stated without polemic: the two customs carry different emphases, the Supper's Passover setting on one side and the living, risen loaf on the other, and the Orthodox Church has simply kept the bread it received — the ordinary food of every table, offered and returned as the Bread of Life.
Nothing offered is ordinary again
Only the Lamb is consecrated, but no offered bread returns to common use. The rest of the loaves is cut into small pieces and distributed at the end of the Liturgy as antidoron — blessed bread given to all — and in many parishes whole loaves marked with the names of those who requested commemorations go home with them, to be eaten with prayer through the week, often in the morning with holy water. A cousin of the prosphora appears at festal Vespers, when five loaves are blessed at the artoklasia. From kitchen to altar and back to the kitchen table, the loop the prosphora travels is Orthodox theology of matter in miniature: creation offered to God, filled with blessing, and given back to feed His people.