Unleavened bread in the eucharist

Doctrine · On the sacraments · from 1053

The eucharist is to be celebrated with unleavened bread.

The Latin usage, and the charge Michael Cerularius pressed in 1053 — the closing of the Latin churches in Constantinople was over bread. It is the second article of the quarrel of 1054, after the creed.

Held it

1053 — The Roman Catholic Church (Holds). Uses unleavened bread, which is the usage Constantinople objected to. The Orthodox Church in the Byzantine Empire · Hussey, part 2, on the events of 1054

Refused it

1053 — Leo of Ohrid (Rejects). Writes the letter that opens the quarrel, against unleavened bread and the Saturday fast. The Orthodox Church in the Byzantine Empire · Hussey, part 2, on the events of 1054
1053 — Michael I Cerularius (Rejects). Closes the Latin churches of Constantinople over the usage. The Orthodox Church in the Byzantine Empire · Hussey, part 2, on the events of 1054
1054 — The Eastern Orthodox Church (Rejects). Uses leavened bread and treats the Latin usage as a departure. The Orthodox Church in the Byzantine Empire · Hussey, part 2, on the events of 1054

In the disputes

The Great Schism The quarrel of 1053–54 was about unleavened bread and the creed, argued by legates whose commission had lapsed with the pope who sent them.

In the churches

The Roman Mass Rome · unleavened bread

First stated in this form after The Orthodox Church in the Byzantine Empire · Hussey, part 2, on the events of 1054.