The new £3.5 million library will provide an additional 650m 2to the existing 17th century building - thought to be based on a design by Sir Christopher Wren - and is partly sunk into the provost's garden, making it virtually invisible from the surrounding gardens.
This latest win follows Mather's Corpus Christi project, featured in this week's issue (AJ 13.07.06).
The building will provide a home for the college's historic collection and the Peet Library of Egyptology.
Sloping rooflights along one wall will give views up to the west elevation of the old library. Entry will be down a shallow glass-covered ramp against the south garden wall, allowing for disabled access.
It will also have additional open access and reserve collections and nearly double the number of reader spaces.
Rick Mather Architects beat strong opposition from MacCormac Jamieson Prichard Architects and locally based Berman Guedes Stretton Architects to win the project.