The Tracery of the Great West Window at York Minster

In 1986, close inspection if the great west window if York Minster revealed its tracery to be in such poor condition that remedial work, long postponed because if a succession if more urgent priorities, could be delayed no longer.Two, conflicting, policies were proposed: (i) to attempt to retain in situ the tracery and mullions by patching and repair, for as long as the stonework should survive or (ii) to halt further deterioration of the tracery by removing it to secure storage from the damaging environment if the window. To an important degree the choice if policy was to turn upon confirmation if the date if the tracery, widely believed to be an early 19th-century copy if the medieval original.Examination if the stonework, based in a photogrammetric survey, showed the tracery to be of the 14th century, albeit substantially refixed — findings which were instrumental in determining that the tracery should be preserved. The window was accordingly dismantled and the tracery buried in Dean's Park, on the north side of the Minster.

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