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Oxford House Arms: Dominus Illuminatio Mea
Dominus Illuminatio Mea (the opening words of Psalm 27, which may be translated as ‘the Lord is my light’), was in at least occasional use by the second half of the 16th century. The current University device was designed in 1993. The device, which features the traditional arms within an encircling belt, is a registered trademark of the University of Oxford.
The heavy volume with clasps (leather straps fixed to the edge of one cover and fastening on studs on the back of the other) was useful in protecting its leaves and symbolical of its character as a treasure chamber of knowledge.
The origin of the three crowns is not known exactly but may be associated with King Edmund the Martyr, King Arthur and Jesus Christ.
Source: Oxford University Archives 2014