Synod of Whitby (664): Rome or Iona for Northumbria

The Synod of Whitby was a church council held in 664 at Abbess Hilda’s monastery of Streanæshalch, now Whitby in North Yorkshire. There King Oswiu of Northumbria had to choose between the Irish customs of Iona and the practices of Rome, above all how to calculate the date of Easter. His decision for Rome tied the English church more closely to continental Christianity and shaped its organisation for centuries.

Background: two missions, one kingdom

Christianity reached the English kingdoms from two directions. In 597 the Gregorian mission led by Augustine arrived in Kent from Rome. A Roman missionary, Paulinus, converted King Edwin of Northumbria in 627, but after Edwin’s death in battle in 633 the mission collapsed.

The next Northumbrian king, Oswald, had spent his exile among the Irish monks of Iona, the monastery founded by Saint Columba in 563. In 635 he invited Aidan from Iona, who founded the monastery of Lindisfarne. For three decades Irish-trained bishops and monks led the church in Northumbria and spread Christianity to Mercia, Essex and beyond.

These missionaries followed Iona’s customs. The most visible differences from Rome were the method of calculating Easter and the monastic tonsure, the way monks shaved their heads.

The Easter question

Easter falls on a Sunday after the first full moon of spring, but churches used different tables to calculate it. Iona followed an older system, often called the latercus, based on an 84-year cycle and allowing Easter between the 14th and 20th days of the lunar month. Rome by this time used tables that allowed Easter only between the 15th and 21st days and were based on the 19-year cycle of Alexandrian tradition.

The tonsure was a smaller but visible issue. Roman monks shaved the crown of the head, leaving a ring of hair said to recall Christ’s crown of thorns. Irish monks shaved the front of the head, probably from ear to ear, a style their opponents linked with the magician Simon Magus.

The two systems sometimes produced dates a week or more apart. At Oswiu’s court the problem was personal. His queen, Eanflæd, had been raised in Kent and followed the Roman reckoning. Bede reports that in some years the king was celebrating Easter while the queen was still fasting for Palm Sunday.

Pressure for change also came from within Northumbria. Oswiu’s son Alhfrith, sub-king of Deira, favoured Roman customs and had given the monastery of Ripon to Wilfrid, a young Northumbrian who had travelled to Rome and Gaul.

What happened at Whitby

Oswiu summoned the synod in 664 to settle the issue. The main source is Bede’s Ecclesiastical History, written about 731, with a shorter account in Stephen of Ripon’s Life of Wilfrid.

On the Irish side were Bishop Colmán of Lindisfarne, Abbess Hilda and her community, and Bishop Cedd of the East Saxons, who acted as interpreter. On the Roman side were Agilbert, a Frankish bishop who had served in Wessex, his priest Agatho, the deacon James (a survivor of Paulinus’s mission), Romanus (the queen’s chaplain), Alhfrith and Wilfrid.

Colmán argued that his practice came from Columba and ultimately from the apostle John. Agilbert asked Wilfrid to speak for the Roman party, since he spoke English better. Wilfrid argued that the Roman custom was followed by the universal Church, in Rome, Gaul, Africa, Asia and Egypt, and that a remote corner of the world should not oppose it. He invoked the authority of Saint Peter, to whom Christ had given the keys of the kingdom of heaven.

According to Bede, Oswiu asked both sides whether Christ had indeed given these keys to Peter, and both agreed. The king then said he would not oppose the keeper of heaven’s gates, in case Peter refused to open them for him. Whether or not the exchange happened exactly like this, the decision was clear: Northumbria would follow Rome.

Key people

Oswiu (reigned 642–670) was the most powerful English king of his time and had defeated Penda of Mercia in 655. His choice reflected both religious conviction and political calculation, since alignment with Rome and Canterbury suited a king with wide ambitions.

Wilfrid (c. 634–709/710) became one of the most forceful and controversial churchmen of the age, later bishop of York, and spent much of his career in disputes with kings and archbishops.

Colmán (died 675), the third bishop of Lindisfarne, refused to accept the decision. Hilda (614–680), a royal kinswoman who ruled a double house of men and women, accepted it and trained several future bishops.

Consequences

Colmán resigned his see and left with Irish monks and about 30 English followers, first to Iona and then to the island of Inishbofin off western Ireland, where he founded a monastery. Lindisfarne remained an important monastery, but under bishops who followed Roman custom.

The same year an epidemic, recorded by Bede, struck England and Ireland and killed many leading figures, including Colmán’s successor Tuda. Wilfrid was chosen as bishop and went to Gaul for consecration, while Chad was consecrated in his absence, beginning a long dispute.

In 668 Pope Vitalian consecrated Theodore of Tarsus as archbishop of Canterbury, and he reached England in 669. At the Synod of Hertford in 672 or 673 he brought the English bishops together under common rules. Iona itself adopted the Roman Easter in 716.

Legacy

Bede, born around 673 in Northumbria, wrote his account of Whitby two generations later as a firm supporter of the Roman Easter. He also wrote warmly of Aidan and the Irish monks, praising their holiness while regretting their dating. His balanced but partisan narrative has shaped every later telling of the synod.

In the 19th and 20th centuries the synod was often used in debates about national identity. Some writers presented it as the moment England submitted to Rome, others as the triumph of order over Celtic independence. Modern historians stress practical motives instead: the need for a single calendar, the growing links between English kingdoms and the Continent, and Oswiu’s interest in a church organisation that matched his power.

The site itself became a centre of learning under Hilda, and the poet Cædmon, the earliest named English poet, lived there in her time.

Myths and facts

Myth: Whitby was a contest between a “Celtic Church” and the Roman Catholic Church. Fact: Both sides recognised the Pope and shared the same faith. Historians now see a dispute over calendars, customs and influence, not two separate churches.

Myth: The synod suppressed Irish influence in England. Fact: Irish learning and art continued to shape Northumbria, as works such as the Lindisfarne Gospels, made around 700, show.

Timeline

• 597: Augustine’s mission from Rome arrives in Kent.
• 627: King Edwin of Northumbria is baptised by Paulinus.
• 635: Aidan comes from Iona and founds Lindisfarne.
• 657: Hilda founds the monastery at Streanæshalch (Whitby).
• 664: Oswiu holds the synod and adopts Roman Easter.
• 664: Colmán leaves Northumbria; plague kills Bishop Tuda.
• 669: Theodore of Tarsus arrives as archbishop of Canterbury.
• 716: Iona accepts the Roman date of Easter.

Why it matters

The Synod of Whitby marked a turning point in how the English church saw itself. By choosing Rome, Northumbria joined the mainstream of Western Christianity, opening the way for Theodore’s reforms and for the scholarship of Bede’s monasteries, while keeping much of the Irish cultural inheritance it had received from Iona.