The upper field of the Douai coat of arms has a central abbot's mitre.
Either side of the mitre are fleur-de-lys representing the two homes of
the monks in France, Paris and Douai. Separating the upper field from the
rest of the shield is an engrailed line which represents the sea which
was crossed when the monks returned to England in 1903. Below this are
the three crowns of St Edmund, the crown of an earthly king, the crown
of chastity and the crown of a martyr for the faith. The motto "Dominus
mihi adjutor" means "the Lord is my helper".
The coat of arms was composed by the College of Heralds in 1929