Olive Oil and the Byzantine Table
When Rome fell in the west, the eastern empire carried on for another thousand years — and olive oil flowed through all of it. On the Byzantine table it was the cooking fat of fasting days, the fuel that lit homes and churches, and a traded good valuable enough to tax.
Byzantine Christianity prescribed long stretches of fasting, when meat, dairy and often oil itself were forbidden. That made the distinction between days with oil and days without a defining rhythm of the kitchen. On the many days when oil was allowed but animal fat was not, olive oil became the cook’s mainstay — vegetables, pulses and greens dressed and cooked in it. The Aegean and the Levantine coast supplied the empire’s tables, and a household’s store of oil was a measure of its standing. Lean times were quite literally times without oil.
A fat for fasting and feasting
The rule had a name: xerophagy, ‘dry eating’, when even olive oil was set aside and the plate fell back on bread, raw or soaked vegetables, pulses, and water. In monasteries the strictest calendars called for oil-free days on Wednesdays and Fridays through the year, and more austerely still in Great Lent. Between those days, oil returned as the great softener of a meatless cuisine. The whole Byzantine calendar can be read through the fat: an ordinary day allowed it, a penitential one did not, and a feast crowned the return of oil, wine and richer fare. Few societies have measured piety so precisely by the cruet.
Light, medicine and holy chrism
The Byzantine reach for oil went well beyond food. Clay and bronze lamps burned it for light in homes, workshops and the great churches, where rows of lamps made olive oil a constant running cost of worship. Physicians used it as a base for ointments and remedies, following the Greco-Roman medical tradition. And oil blessed and perfumed became holy chrism, central to baptism and to the coronation of emperors alike. A commodity this woven into food, faith and daily survival was inevitably traded, regulated and prized — wealth you could measure by the amphora.
What the fasting calendar quietly protected
Here is the non-obvious point. A religion that forbade oil for large parts of the year did not shrink the olive’s importance — it magnified it. Scarcity by decree made oil precious, its return a small feast, its quality worth caring about. Institutions that burned it before icons and poured it over emperors had every reason to want it pure, bright and unspoiled. Some of the earliest careful attention to storing and keeping olive oil survives precisely because church and monastery could not afford theirs to turn rancid. Faith, oddly, was an early quality-control department.
| Empire’s span | Roughly a thousand years after Rome’s western fall |
|---|---|
| Everyday role | Cooking fat, especially on meatless fasting days |
| Fasting rule | Xerophagy — ‘dry eating’, no oil, on prescribed days |
| Strict oil-free days | Often Wednesdays and Fridays; more in Great Lent |
| Beyond food | Lamp fuel, medicine base, and holy chrism |
| Supply | The Aegean and Levantine coasts fed the empire’s tables |
The oil calendar of Byzantium
| Kind of day | What oil did |
|---|---|
| Ordinary day | Olive oil allowed; the mainstay of a largely meatless kitchen |
| Fasting day (xerophagy) | No oil — bread, raw or soaked vegetables, pulses, water |
| Great Lent | Long stretches oil-free, the strictest fasting of the year |
| Feast day | Oil, wine and richer food return — a celebrated release |
| Every day, in church | Lamps burned oil constantly before the icons |
| Great occasions | Blessed oil as chrism, for baptism and coronation |
The long thread
- Byzantine cooking is a model meatless cuisine — vegetables and pulses carried by good oil.
- The fasting rhythm made oil precious; scarcity by decree, not shortage.
- Church demand pushed early care for keeping oil pure and unspoiled.
- The essentials barely changed: the oil on your table would be familiar to a sixth-century cook.
Olive oil and Byzantium: common questions
How important was olive oil to Byzantium?
Central — it was cooking fat, lamp fuel, medicine base and holy chrism, and a taxed, traded commodity all at once.
What is xerophagy?
‘Dry eating’ — the strict fasting rule that set even olive oil aside on prescribed days, leaving bread, vegetables, pulses and water.
When did Byzantines fast from oil?
Often on Wednesdays and Fridays, and through long stretches of Great Lent, with monasteries keeping the strictest calendars.
Why did churches need so much oil?
Rows of lamps burned constantly before the icons, making olive oil a permanent running cost of worship.
What was Byzantine chrism?
Blessed, perfumed olive oil used in sacred rites, from baptism to the coronation of emperors.
The counter-intuitive thing about Byzantium is that forbidding oil for much of the year made it matter more, not less. A day with oil was a small feast; a day without was penance you could taste. And because church and monastery burned oil before icons and poured it over emperors, they could not let theirs go rancid — so some of the earliest fussing over storing and keeping olive oil comes not from merchants but from monks. Faith ran an early quality-control desk, and the plate benefited.
Drawn from Byzantine social and culinary history and Orthodox fasting (xerophagy) practice.