The Synod of Whitby was an assembly held in 664 by King Oswiu of Northumbria, with the aim of deciding whether Oswiu's kingdom should follow Roman Christian customs or those of the Irish Christians at Iona, particularly regarding the calculation of the date of Easter. The synod was held at Saint Hilda's monastery of Streanæshalch, later known as Whitby Abbey.
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Definition
Timeline
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642 - 670Reign of Oswiu in Northumbria.
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654Reunification of Northumbria under King Oswiu.
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657Hilda of Whitby, granted 1200 acres by King Oswiu of Northumbria, founds Whitby Abbey.
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664Hilda of Whitby host the Synod of Whitby; Oswiu of Northumbria decides in favor of Roman Catholicism over Celtic Christianity.